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Find-A-Code Articles, Published 2014, August 1

What does accept assignment mean.

by   InstaCode Institute Aug 1st, 2014 - Reviewed/Updated Mar 5th

What does it mean to accept assignment on the CMS 1500 claim form - also called the HCFA 1500 claim form.? Should I accept assignment or not? What are the guidelines for accepting assignment in box 27 of the 1500 claim?

These commonly asked questions should have a simple answer, but the number of court cases indicates that it is not as clear cut as it should be. This issue is documented in the book “Problems in Health Care Law” by Robert Desle Miller. The definition appears to be in the hands of the courts. However, we do have some helpful guidelines for you.

One major area of confusion is the relationship between box 12, box 13 and box 27.  These are not interchangeable boxes and they are not necessarily related to each other.

According to the National Uniform Claim Committee (NUCC), the "Accept Assignment" box indicates that the provider agrees to accept assignment.  It simply says to enter an X in the correct box.  It does NOT define what accepting assignment might or might not mean.

It is important to understand that if you are a participating provider in any insurance plan or program, you must first follow the rules according to the contract that you sign. That contract supersedes any guidelines that are included here.

Medicare Instructions / Guidelines

PARTICIPATING providers MUST accept assignment according to the terms of their contract.  The contract itself states:

“Meaning of  Assignment  - For purposes of this agreement, accepting  assignment  of the Medicare Part B payment means requesting direct Part B payment from the Medicare program.  Under an  assignment , the approved charge, determined by the Medicare carrier, shall be the full charge for the service covered under Part B.  The participant shall not collect from the beneficiary or other person or organization for covered services more than the applicable deductible and coinsurance.”

By law, the providers or types of services listed below MUST also accept assignment:

• Clinical diagnostic laboratory services;
• Physician services to individuals dually entitled to Medicare and Medicaid;
• Services of physician assistants, nurse practitioners, clinical nurse specialists, nurse midwives, certified registered nurse anesthetists, clinical psychologists, and clinical social workers;
• Ambulatory surgical center services for covered ASC procedures;
• Home dialysis supplies and equipment paid under Method II;
• Ambulance services;
• Drugs and biologicals; and
• Simplified Billing Roster for influenza virus vaccine and pneumococcal vaccine.

NON-PARTICIPATING providers can choose whether to accept assignment or not, unless they or the service they are providing is on the list above.

The official Medicare instructions regarding Boxes 12 and 13 are:

“Item 12 – The patient's signature authorizes release of medical information necessary to process the claim. It  also authorizes payments of benefits  to the provider of service or supplier when the provider of service or supplier accepts assignment on the claim.” “Item 13 - The patient’s signature or the statement “signature on file” in this item  authorizes payment of medical benefits  to the physician or supplier. The patient or his/her authorized representative signs this item or the signature must be on file separately with the provider as an authorization. However, note that when payment under the Act can only be made on an assignment-related basis or when payment is for services furnished by a participating physician or supplier, a patient’s signature or a “signature on file” is not required in order for Medicare payment to be made directly to the physician or supplier.”

Regardless of the wording on these instructions stating that it authorizes payments to the physician, this is not enough to ensure that payment will come directly to you instead of the patient.To guarantee payment comes to you, you MUST accept assignment.

Under Medicare rules, PARTICIPATING providers are paid at 80% of the  physician fee schedule allowed amount  and NON-participating providers are paid at 80% of the allowed amount, which is 5% less than the full Allowed amount for participating providers. Only NON-participating providers may "balance bill" the patient for any amounts not paid by Medicare, however, they are subject to any state laws regarding balance billing.

TIP: If you select YES, you may or may not be subject to a lower fee schedule, but at least you know the payment is  supposed  to come to you.

NON-MEDICARE Instructions / Guidelines

PARTICIPATING providers MUST abide by the terms of their contract.  In most cases, this includes the requirement to accept assignment on submitted claims.

NON-PARTICIPATING providers have the choice to accept or not accept assignment.

YES means that payment should go directly to you instead of the patient.  Generally speaking, even if you have an assignment of benefits from the patient (see box 12 & 13), payment is ONLY guaranteed to go to you IF you accept assignment.

NO is appropriate for patients who have paid for their services in full so they may be reimbursed by their insurance.  It generally means payment will go to the patient.

What Does Accept Assignment Mean?. (2014, August 1). Find-A-Code Articles. Retrieved from https://www.findacode.com/articles/what-does-accept-assignment-mean-34840.html

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As a Medical Biller, the better you understand the medical insurance payment process, the better you can care for your patients. Your understanding of what a patient will owe and what will be covered can help them navigate the confusing world of medical insurance.

One term that can be very confusing for patients (and for doctors as well) is ‘Accepting Assignment’.

Essentially, ‘assignment’ means that a doctor, (also known as provider or supplier) agrees (or is required by law) to accept a Medicare-approved amount as full payment for covered services.

This amount may be lower or higher than an individual’s insurance amount, but will be on par with Medicare fees for the services.

If a doctor participates with an insurance carrier, they have a contract and agree that the provider will accept the allowed amount, then the provider would check “yes”.  

If they do not participate and do not wish to accept what the insurance carrier allows, they would check “no”.   It is important to note that a provider who does not participate can still opt to accept assignment on just a particular claim by checking the “yes” box just for those services.

In other words by saying your office will accept assignment, you are agreeing to the payment amount being covered by the insurer, or medicare, and the patient has no responsibility.

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Medicare Assignment

Home / Medicare 101 / Medicare Costs / Medicare Assignment

Summary: If a provider accepts Medicare assignment, they accept the Medicare-approved amount for a covered service. Though most providers accept assignment, not all do. In this article, we’ll explain the differences between participating, non-participating, and opt-out providers. You’ll also learn how to find physicians in your area who accept Medicare assignment. Estimated Read Time: 5 min

What is Medicare Assignment

Medicare assignment is an agreement by your doctor or other healthcare providers to accept the Medicare-approved amount as the full cost for a covered service. Providers who “accept assignment” bill Medicare directly for Part B-covered services and cannot charge you more than the applicable deductible and coinsurance.

Most healthcare providers who opt-in to Medicare accept assignment. In fact, CMS reported in its Medicare Participation for Calendar Year 2024 announcement that 98 percent of Medicare providers accepted assignment in 2023.

Providers who accept Medicare are divided into two groups: Participating providers and non-participating providers. Providers can decide annually whether they want to participate in Medicare assignment, or if they want to be non-participating.

Providers who do not accept Medicare Assignment can charge up to 15% above the Medicare-approved cost for a service. If this is the case, you will be responsible for the entire amount (up to 15%) above what Medicare covers.

Below, we’ll take a closer look at participating, non-participating, and opt-out physicians.

Medicare Participating Providers: Providers Who Accept Medicare Assignment

Healthcare providers who accept Medicare assignment are known as “participating providers”. To participate in Medicare assignment, a provider must enter an agreement with Medicare called the Participating Physician or Supplier Agreement. When a provider signs this agreement, they agree to accept the Medicare-approved charge as the full charge of the service. They cannot charge the beneficiary more than the applicable deductible and coinsurance for covered services.

Each year, providers can decide whether they want to be a participating or non-participating provider. Participating in Medicare assignment is not only beneficial to patients, but to providers as well. Participating providers get paid by Medicare directly, and when a participating provider bills Medicare, Medicare will automatically forward the claim information to Medicare Supplement insurers. This makes the billing process much easier on the provider’s end.

Medicare Non-Participating Providers: Providers Who Don’t Accept Assignment

Healthcare providers who are “non-participating” providers do not agree to accept assignment and can charge up to 15% over the Medicare-approved amount for a service. Non-participating Medicare providers still accept Medicare patients. However they have not agreed to accept the Medicare-approved cost as the full cost for their service.

Doctors who do not sign an assignment agreement with Medicare can still choose to accept assignment on a case-by-case basis. When non-participating providers do add on excess charges , they cannot charge more than 15% over the Medicare-approved amount. It’s worth noting that providers do not have to charge the maximum 15%; they may only charge 5% or 10% over the Medicare-approved amount.

When you receive a Medicare-covered service at a non-participating provider, you may need to pay the full amount at the time of your service; a claim will need to be submitted to Medicare for you to be reimbursed. Prior to receiving care, your provider should give you an Advanced Beneficiary Notice (ABN) to read and sign. This notice will detail the services you are receiving and their costs.

Non-participating providers should include a CMS-approved unassigned claim statement in the additional information section of your Advanced Beneficiary Notice. This statement will read:

“This supplier doesn’t accept payment from Medicare for the item(s) listed in the table above. If I checked Option 1 above, I am responsible for paying the supplier’s charge for the item(s) directly to the supplier. If Medicare does pay, Medicare will pay me the Medicare-approved amount for the item(s), and this payment to me may be less than the supplier’s charge.”

This statement basically summarizes how excess charges work: Medicare will pay the Medicare-approved amount, but you may end up paying more than that.

Your provider should submit a claim to Medicare for any covered services, however, if they refuse to submit a claim, you can do so yourself by using CMS form 1490S .

Opt-Out Providers: What You Need to Know

Opt-out providers are different than non-participating providers because they completely opt out of Medicare. What does this mean for you? If you receive supplies or services from a provider who opted out of Medicare, Medicare will not pay for any of it (except for emergencies).

Physicians who opt-out of Medicare are even harder to find than non-participating providers. According to a report by KFF.org, only 1.1% of physicians opted out of Medicare in 2023. Of those who opted out, most are physicians in specialty fields such as psychiatry, plastic and reconstructive surgery, and neurology.

How to Find A Doctor Who Accepts Medicare Assignment

Finding a doctor who accepts Medicare patients and accepts Medicare assignment is generally easier than finding a provider who doesn’t accept assignment. As we mentioned above, of all the providers who accept Medicare patients, 98 percent accept assignment.

The easiest way to find a doctor or healthcare provider who accepts Medicare assignment is by visiting Medicare.gov and using their Compare Care Near You tool . When you search for providers in your area, the Care Compare tool will let you know whether a provider is a participating or non-participating provider.

If a provider is part of a group practice that involves multiple providers, then all providers in that group must have the same participation status. As an example, we have three doctors, Dr. Smith, Dr. Jones, and Dr. Shoemaker, who are all part of a group practice called “Health Care LLC”. The group decides to accept Medicare assignment and become a participating provider. Dr. Smith decides he does not want to accept assignment, however, because he is part of the “Health Care LLC” group, he must remain a participating provider.

Using Medicare’s Care Compare tool, you can select a group practice and see their participation status. You can then view all providers who are part of that group. This makes finding doctors who accept assignment even easier.

To ensure you don’t end up paying more out-of-pocket costs than you anticipated, it’s always a good idea to check with your provider if they are a participating Medicare provider. If you have questions regarding Medicare assignment or are having trouble determining whether a provider is a participating provider, you can contact Medicare directly at 1-800-633-4227. If you have questions about excess charges or other Medicare costs and would like to speak with a licensed insurance agent, you can contact us at the number above.

Announcement About Medicare Participation for Calendar Year 2024, Centers for Medicare & Medicaid Services. Accessed January 2024

https://www.cms.gov/files/document/medicare-participation-announcement.pdf

Annual Medicare Participation Announcement, CMS.gov. Accessed January 2024

https://www.cms.gov/medicare-participation

Does Your Provider Accept Medicare as Full Payment? Medicare.gov. Accessed January 2024

https://www.medicare.gov/basics/costs/medicare-costs/provider-accept-Medicare

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Does your provider accept Medicare as full payment?

You can get the lowest cost if your doctor or other health care provider accepts the Medicare-approved amount  as full payment for a covered service. This is called “accepting assignment.” If a provider accepts assignment, it’s for all Medicare-covered Part A and Part B services.

Using a provider that accepts assignment

Most doctors, providers, and suppliers accept assignment, but always check to make sure that yours do.

If your doctor, provider, or supplier accepts assignment:

• Your out-of-pocket costs may be less.
• They agree to charge you only the Medicare deductible and coinsurance amount, and usually wait for Medicare to pay its share before asking you to pay your share.
• They have to submit your claim directly to Medicare and can't charge you for submitting the claim.

How does assignment impact my drug coverage?

Using a provider that doesn't accept Medicare as full payment

Some providers who don’t accept assignment still choose to accept the Medicare-approved amount for services on a case-by-case basis. These providers are called "non-participating."

If your doctor, provider, or supplier doesn't accept assignment:

• You might have to pay the full amount at the time of service.
• They should submit a claim to Medicare for any Medicare-covered services they give you, and they can’t charge you for submitting a claim. If they refuse to submit a Medicare claim, you can submit your own claim to Medicare. Get the Medicare claim form .
• They can charge up to 15% over the Medicare-approved amount for a service, but no more than that. This is called "the limiting charge."  

Does the limiting charge apply to all Medicare-covered services?

Using a provider that "opts-out" of Medicare

• Doctors and other providers who don’t want to work with the Medicare program may "opt out" of Medicare.
• Medicare won’t pay for items or services you get from provider that opts out, except in emergencies.
• Providers opt out for a minimum of 2 years. Every 2 years, the provider can choose to keep their opt-out status, accept Medicare-approved amounts on a case-by-case basis ("non-participating"), or accept assignment.

Find providers that opted out of Medicare.

Private contracts with doctors or providers who opt out

• If you choose to get services from an opt-out doctor or provider you may need to pay upfront, or set up a payment plan with the provider through a private contract.
• Medicare won’t pay for any service you get from this doctor, even if it’s a Medicare-covered service.

What are the rules for private contracts?

You may want to contact your  State Health Insurance Assistance Program (SHIP) for help before signing a private contract with any doctor or other health care provider.

What do you want to do next?

• Next step: Get help with costs
• Take action: Find a provider
• Get details: How to get Medicare services

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If you have Original Medicare , your Part B costs once you have met your deductible can vary depending on the type of provider you see. For cost purposes, there are three types of provider, meaning three different relationships a provider can have with Medicare . A provider’s type determines how much you will pay for Part B -covered services.

• These providers are required to submit a bill (file a claim ) to Medicare for care you receive. Medicare will process the bill and pay your provider directly for your care. If your provider does not file a claim for your care, there are troubleshooting steps to help resolve the problem .
• If you see a participating provider , you are responsible for paying a 20% coinsurance for Medicare-covered services.
• Certain providers, such as clinical social workers and physician assistants, must always take assignment if they accept Medicare.
• Non-participating providers can charge up to 15% more than Medicare’s approved amount for the cost of services you receive (known as the limiting charge ). This means you are responsible for up to 35% (20% coinsurance + 15% limiting charge) of Medicare’s approved amount for covered services.
• Some states may restrict the limiting charge when you see non-participating providers. For example, New York State’s limiting charge is set at 5%, instead of 15%, for most services. For more information, contact your State Health Insurance Assistance Program (SHIP) .
• If you pay the full cost of your care up front, your provider should still submit a bill to Medicare. Afterward, you should receive from Medicare a Medicare Summary Notice (MSN) and reimbursement for 80% of the Medicare-approved amount .
• The limiting charge rules do not apply to durable medical equipment (DME) suppliers . Be sure to learn about the different rules that apply when receiving services from a DME supplier .
• Medicare will not pay for care you receive from an opt-out provider (except in emergencies). You are responsible for the entire cost of your care.
• The provider must give you a private contract describing their charges and confirming that you understand you are responsible for the full cost of your care and that Medicare will not reimburse you.
• Opt-out providers do not bill Medicare for services you receive.
• Many psychiatrists opt out of Medicare.

Providers who take assignment should submit a bill to a Medicare Administrative Contractor (MAC) within one calendar year of the date you received care. If your provider misses the filing deadline, they cannot bill Medicare for the care they provided to you. However, they can still charge you a 20% coinsurance and any applicable deductible amount.

Be sure to ask your provider if they are participating, non-participating, or opt-out. You can also check by using Medicare’s Physician Compare tool .

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What Is Medicare Assignment?

Written by: Rachael Zimlich, RN, BSN

Reviewed by: Eboni Onayo, Licensed Insurance Agent

Key Takeaways

Medicare assignment describes the fee structure that your doctor and Medicare have agreed to use.

If your doctor agrees to accept Medicare assignment, they agree to be paid whatever amount Medicare has approved for a service.

You may still see doctors who don’t accept Medicare assignment, but you may have to pay for your visit up front and submit a claim to Medicare for reimbursement.

You may have to pay more to see doctors who don’t accept Medicare assignment.

How Does Medicare Assignment Work?

What is Medicare assignment ?

Medicare assignment simply means that your provider has agreed to stick to a Medicare fee schedule when it comes to what they charge for tests and services. Medicare regularly updates fee schedules, setting specific limits for what it will cover for things like office visits and lab testing.

When a provider agrees to accept Medicare assignment, they cannot charge more than the Medicare-approved amount. For you, this means your out-of-pocket costs may be lower than if you saw a provider who did not accept Medicare assignment. The provider acknowledges that the amount Medicare set for a particular service is the maximum amount that will be paid.

You may still have to pay a Medicare deductible and coinsurance, but your provider will have to submit a claim to Medicare directly and wait for payment before passing any share of the costs onto you. Doctors who accept Medicare assignment cannot charge you to submit these claims.

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How Do I Know if a Provider Accepts Medicare Assignment?

There are a few levels of commitment when it comes to Medicare assignment.

• Providers who have agreed to accept Medicare assignment sign a contract with Medicare.
• Those who have not signed a contract with Medicare can still accept assignment amounts for services of their choice. They do not have to accept assignment for every service provided. These are called non-participating providers.
• Some providers opt out of Medicare altogether. Doctors who have opted out of Medicare completely or who use private contracts will not be paid anything by Medicare, even if it’s for a covered service within the fee limits. You will have to pay the full cost of any services provided by these doctors yourself.

You can check to see if your provider accepts Medicare assignment on Medicare’s website .

Billing Arrangement Options for Providers Who Accept Medicare

Doctors that take Medicare can sign a contract to accept assignment for all Medicare services, or be a non-participating provider that accepts assignment for some services but not all.

A medical provider that accepts Medicare assignment must submit claims directly to Medicare on your behalf. They will be paid the agreed upon amount by Medicare, and you will pay any copayments or deductibles dictated by your plan.

If your doctor is non-participating, they may accept Medicare assignment for some services but not others. Even if they do agree to accept Medicare’s fee for some services, Medicare will only pay then 95% of the set assignment cost for a particular service.

If your provider does plan to work with Medicare, either the provider or you can submit a claim to Medicare, but you may have to pay the entire cost of the visit up front and wait for reimbursement. They can’t charge you for more than the amount approved by Medicare, but they can charge you above the Medicare-approved amount. This is called the limiting charge, and can be up to 15% more than Medicare-approved amount for non-participating providers.

What Does It Mean When a Provider Does Not Accept Medicare Assignment?

Providers who refuse Medicare assignment can still choose to accept Medicare’s set fees for certain services. These are called non-participating providers.

There are a number of providers who opt out of participating in Medicare altogether; they are referred to as “opt-out doctors”. This means they have signed an opt-out agreement with Medicare and can’t be paid by Medicare at all — even for services normally covered by Medicare. Opt-out contracts last for at least two years. Some of these providers may only offer services to patients who sign contracts.

You do not need to sign a contract with a private provider or use an opt-out provider. There are many options for alternative providers who accept Medicare. If you do choose an opt-out or private contract provider, you will have to pay the full cost of services on your own.

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Do providers have to accept Medicare assignment?

No. Providers can choose to accept a full Medicare assignment, or accept assignment rates for some services as a non-participating provider. Doctors can also opt out of participating in Medicare altogether.

How much will I have to pay if my provider doesn't accept Medicare assignment?

Some providers that don’t accept assignment as a whole will accept assignment for some services. These are called non-participating providers. For these providers and providers who have completely opted out of Medicare, you will pay the majority of or the full amount for your care.

How do I submit a claim?

If you need to submit your own claim to Medicare, you can call 1-800-MEDICARE or use Form CMS-1490S .

Can my provider charge to submit a claim?

No. Providers are not allowed to charge to submit a claim to Medicare on your behalf.

Lower Costs with Assignment. Medicare.gov.

Fee Schedules . CMS.gov.

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What does ‘accepting assignment’ mean?

Accepting assignment is a real concern for those who have Original Medicare coverage. Physicians (or any other healthcare providers or facilities) who accept assignment agree to take Medicare’s payment for services. They cannot bill a Medicare beneficiary in excess of the Medicare allowance, which is the copayment or coinsurance. While providers who participate in the Medicare program must accept assignment on all Medicare claims, they do not have to accept every Medicare beneficiary as a patient. 

There are basically three Medicare options for physicians.

• Physicians may sign a participating agreement and accept Medicare’s allowed charge as payment-in-full for all of their Medicare patients. Use the Physician Compare database to find physicians who accept assignment. 
• They may elect to be non-participating, in which case, they make decisions about accepting Medicare assignment on a case-by-case basis. They can bill patients up to 15% more than the Medicare allowance. Some Medigap policies offer a benefit to cover this amount, known as Part B excess charges.
• Or, they may opt out of Medicare entirely and become private contracting physicians.  They establish contracts with their patients to bill them directly. Neither the physicians nor the patients would receive any payments from Medicare.

Accepting assignment can also be a concern for beneficiaries with coverage other than Original Medicare, including those:

• in a Medicare Advantage Private Fee-for-service (PFFS) plan who get services outside the network.
• in a Medicare Advantage Medical Savings Account (MSA) plan because this plan does not utilize networks.

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Medicare Assignment: Understanding How It Works

Medicare assignment is a term used to describe how a healthcare provider agrees to accept the Medicare-approved amount. Depending on how you get your Medicare coverage, it could be essential to understand what it means and how it can affect you.

What is Medicare assignment?

Medicare sets a fixed cost to pay for every benefit they cover. This amount is called Medicare assignment.

You have the largest healthcare provider network with over 800,000 providers nationwide on Original Medicare . You can see any doctor nationwide that accepts Medicare.

Understanding the differences between your cost and the difference between accepting Medicare and accepting Medicare assignment could be worth thousands of dollars.

Doctors that accept Medicare

Your healthcare provider can fall into one of three categories:

Medicare participating provider and Medicare assignment

Medicare participating providers not accepting medicare assignment, medicare non-participating provider.

More than 97% of healthcare providers nationwide accept Medicare. Because of this, you can see almost any provider throughout the United States without needing referrals.

Let’s discuss the three categories the healthcare providers fall into.

Participating providers are doctors or healthcare providers who accept assignment. This means they will never charge more than the Medicare-approved amount.

Some non-participating providers accept Medicare but not Medicare assignment. This means you can see them the same way a provider accepts assignment.

You need to understand that since they don’t take the assigned amount, they can charge up to 15% more than the Medicare-approved amount.

Since Medicare will only pay the Medicare-approved amount, you’ll be responsible for these charges. The 15% overcharge is called an excess charge. A few states don’t allow or limit the amount or services of the excess charges. Only about 5% of providers charge excess charges.

Opt-out providers don’t accept Original Medicare, and these healthcare providers are in the minority in the United States. If healthcare providers don’t accept Medicare, they won’t be paid by Medicare.

This means choosing to see a provider that doesn’t accept Medicare will leave you responsible for 100% of what they charge you. These providers may be in-network for a Medicare Advantage plan in some cases.

Avoiding excess charges

Excess charges could be large or small depending on the service and the Medicare-approved amount. Avoiding these is easy. The simplest way is to ask your provider if they accept assignment before service.

If they say yes, they don’t issue excess charges. Or, on Medicare.gov , a provider search tool will allow you to look up your healthcare provider and show if they accept Medicare assignment or not.

Medicare Supplement and Medicare assignment

Medigap plans are additional insurance that helps cover your Medicare cost-share . If you are on specific plans, they’ll pay any extra costs from healthcare providers that accept Medicare but not Medicare assigned amount. Most Medicare Supplement plans don’t cover the excess charges.

The top three Medicare Supplement plans cover excess charges if you use a provider that accepts Medicare but not Medicare assignment.

Medicare Advantage and Medicare assignment

Medicare assignment does not affect Medicare Advantage plans since Medicare Advantage is just another way to receive your Medicare benefits. Since your Medicare Advantage plan handles your healthcare benefits, they set the terms.

Most Medicare Advantage plans require you to use network providers. If you go out of the network, you may pay more. If you’re on an HMO, you’d be responsible for the entire charge of the provider not being in the network.

Do all doctors accept Medicare Supplement plans?

All doctors that accept Original Medicare accept Medicare Supplement plans. Some doctors don’t accept Medicare. In this case, those doctors won’t accept Medicare Supplements.

Where can I find doctors who accept Medicare assignment?

Medicare has a physician finder tool that will show if a healthcare provider participates in Medicare and accepts Medicare assignments. Most doctors nationwide do accept assignment and therefore don’t charge the Part B excess charges.

Why do some doctors not accept Medicare?

Some doctors are called concierge doctors. These doctors don’t accept any insurance and require cash payments.

What is a Medicare assignment?

Accepting Medicare assignment means that the healthcare provider has agreed only to charge the approved amount for procedures and services.

What does it mean if a doctor does not accept Medicare assignment?

The doctor can change more than the Medicare-approved amount for procedures and services. You could be responsible for up to a 15% excess charge.

How many doctors accept Medicare assignment?

About 97% of doctors agree to accept assignment nationwide.

Is accepting Medicare the same as accepting Medicare assignment?

No. If a doctor accepts Medicare and accepts Medicare assigned amount, they’ll take what Medicare approves as payment in full.

If they accept Medicare but not Medicare assignment, they can charge an excess charge of up to 15% above the Medicare-approved amount. You could be responsible for this excess charge.

What is the Medicare-approved amount?

The Medicare-approved amount is Medicare’s charge as the maximum for any given medical service or procedure. Medicare has set forth an approved amount for every covered item or service.

Can doctors balance bill patients?

Yes, if that doctor is a Medicare participating provider not accepting Medicare assigned amount. The provider may bill up to 15% more than the Medicare-approved amount.

What happens if a doctor does not accept Medicare?

Doctors that don’t accept Medicare will require you to pay their full cost when using their services. Since these providers are non-participating, Medicare will not pay or reimburse for any services rendered.

Get help avoiding Medicare Part B excess charges

Whether it’s Medicare assignment, or anything related to Medicare, we have licensed agents that specialize in this field standing by to assist.

Give us a call, or fill out our online request form . We are happy to help answer questions, review options, and guide you through the process.

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Paying a Visit to the Doctor: Current Financial Protections for Medicare Patients When Receiving Physician Services

Cristina Boccuti Published: Nov 30, 2016

• Issue Brief

Under current law, Medicare has several financial protections in place that are designed to safeguard Medicare beneficiaries—seniors and people with permanent disabilities—from unexpected and confusing charges when they seek care from doctors and other practitioners.  These protections include the participating provider program, limitations on balance billing, and conditions on private contracting.  This issue brief describes these three protections, explains why they were enacted, and examines the implications of modifying them for beneficiaries, providers, and the Medicare program.

Main Findings

• The participating provider program was enacted in 1984 for two purposes: (1) to assist Medicare patients with identifying and choosing providers who charge Medicare-approved rates; and (2) to encourage providers to accept these rates. Given this program’s strong provider incentives, the number of participating providers grew rapidly across all states and today, the vast majority (96%) of eligible physicians and practitioners are “participating providers”—agreeing to charge Medicare’s standard fees when they see beneficiaries.
• The Congress instituted limitations on balance billing in 1989, in conjunction with implementation of the Medicare physician fee schedule. This financial protection limits the amount that “non-participating” providers may charge beneficiaries through balance billing—whereby beneficiaries are responsible for the portion of the provider’s charge that exceeds Medicare’s fee-schedule rate. Total out-of-pocket liability from balance billing has declined significantly over the past few decades dropping from $2.5 billion in 1983 ($5.65 billion in 2011 dollars) to $40 million in 2011.
• In 1997, the Congress codified several conditions for private contracting that apply to physicians and practitioners who “opt out” of Medicare and see beneficiaries only under individual private contracts. These restrictions were instituted to ensure that beneficiaries are aware of the financial ramifications of entering into these private contracts, and to safeguard patients and Medicare from fraud and abuse.  In general, private contracting is relatively rare with only 1 percent of practicing physicians opting out of Medicare.

Background: Current Provider Options for Charging Medicare Patients

Under current law, physicians and practitioners have three options for how they will charge their patients in traditional Medicare.  They may register with Medicare as (1) a participating provider, (2) a non-participating provider, or (3) an opt-out provider who privately contracts with each of his or her Medicare patients for payment (Figure 1).  This issue brief describes these three options and then examines three current provisions in Medicare that provide financial protections for Medicare beneficiaries.

Participating providers:   Physicians and practitioners who register with Medicare as participating providers agree to “accept assignment” for all of their Medicare patients. Accepting assignment entails two conditions: agreeing to accept Medicare’s fee-schedule amount as payment-in-full for a given service and collecting Medicare’s portion directly from Medicare, rather than the patient. Therefore, when Medicare patients see participating providers, they can be certain that these providers will not charge fees higher than Medicare’s published fee-schedule amount and that they will not face higher out-of-pocket liability than the maximum 20-percent coinsurance for most services. The vast majority (96%) of providers who provide Medicare-covered services are participating providers.

Non-participating providers:   Non-participating providers do not agree to accept assignment for all of their Medicare patients; instead they may choose—on a service-by-service basis—to charge Medicare patients higher fees, up to a certain limit. When doing so, their Medicare patients are liable for higher cost sharing to cover the higher charges. This arrangement is called “balance billing” and means that the Medicare patient is financially responsible for the portion of the provider’s charge that is in excess of Medicare’s assigned rate, in addition to standard applicable coinsurance and deductibles for Medicare services.  When non-participating providers do not accept assignment, they may not collect reimbursement from Medicare; rather, they bill the Medicare patient directly, typically up front at the time of service. Non-participating providers must submit claims to Medicare on behalf of their Medicare patients, but Medicare reimburses the patient, rather than the nonparticipating provider, for its portion of the covered charges.  A small share (4%) of providers who provide Medicare-covered services are non-participating providers.

Opt-out providers, privately contracting:   Physicians and practitioners who choose to enter into private contracts with their Medicare patients “opt-out” of the Medicare program entirely. These opt-out providers may charge Medicare patients any fee they choose. Medicare does not provide any reimbursement—either to the provider or the Medicare patient—for services provided by these providers under private contracts. Accordingly, Medicare patients are liable for the entire cost of any services they receive from physicians and practitioners who have opted out of Medicare. Several protections are in place to ensure that patients are clearly aware of their financial liabilities when seeing a provider under a private contract.  An extremely small portion of physicians (less than 1% of physicians in clinical practice) have chosen to “opt-out” of the Medicare program, of whom 42 percent are psychiatrists.

These provider options have direct implications on the charges and out-of-pocket liabilities that beneficiaries face when they receive physician services (Figure 2).  They also play a major role in several financial protections in current law—namely, the physician participation program, limitations on balance billing, and conditions for private contracting—which help beneficiaries understand the financial implications of their provider choices and encourage providers to accept Medicare’s standard fees.

Figure 1: Physician/Practitioner Billing Options in Traditional Medicare

Figure 2: Medicare reimbursement and beneficiary cost-sharing for a $100 fee-schedule service

Medicare’s Participating Provider Program

Medicare’s participating provider program includes several incentives (both financial and nonfinancial) to encourage physicians and practitioners to “accept assignment” for all of their Medicare patients.  When providers accept assignment, they agree to accept Medicare’s fee-schedule amount as payment-in-full for a given service and are allowed to bill Medicare directly for its portion of the reimbursement.  Physicians and practitioners who agree to accept assignment on all services that they provide to Medicare patients are “participating providers” and are listed in Medicare provider directories.  Beneficiaries who select a participating provider are assured that, after meeting the deductible, their coinsurance liability will not exceed 20 percent of the charge for the services they receive (Figure 2).

Congress established the participating provider program in the 1984 Deficit Reduction Act (DEFRA) to address two main concerns: confusion among beneficiaries about the fees they were being charged when they saw a doctor and escalating rates of balance billing from charges that exceeded Medicare’s established “usual, customary, and reasonable” rates for their area. 1 At that time, aside from Medicaid-eligible beneficiaries, Medicare had no limits on the amount that physicians and practitioners could balance bill for their services. Surveys conducted by the Physician Payment Review Commission (PPRC), a congressional advisory body and predecessor of the Medicare Payment Advisory Commission (MedPAC), revealed that prior to the participating provider program, beneficiaries often did not know from one physician to the next whether they would face extra out-of-pocket charges due to balance billing and how much those amounts might be. 2   By 1984, beneficiaries’ payment for balance billing reached 27 percent of total Medicare Part B out-of-pocket liability and was jeopardizing their access to affordable physician services. 3

The establishment of the participating provider program in Medicare instituted multiple incentives to encourage providers to accept assignment for all their patients and become participating providers.  For example, Medicare payment rates for participating providers are 5 percent higher than the rates paid to non-participating providers.  Also, participating providers may collect Medicare’s reimbursement amount directly from Medicare, in contrast to non-participating providers who may not collect payment from Medicare and typically bill their Medicare patients upfront for their charges.  (Non-participating providers must submit claims to Medicare so that their patients are reimbursed for Medicare’s portion of their charges.) Participating providers also gain the benefit of having electronic access to Medicare beneficiaries’ supplemental insurance status, such as their Medigap coverage. This information makes it considerably easier for providers to file claims to collect beneficiary coinsurance amounts, as well as easing the paperwork burden on patients.  Additionally, Medicare helps beneficiaries in traditional Medicare seek and select participating providers by listing them by name with their contact information on Medicare’s consumer-focused website (www.Medicare.gov).

Given the strong incentives of the participation program, combined with limits on balance billing (discussed in the next section), it is not surprising that the share of physicians and practitioners electing to be participating providers has risen to high levels across the country. Overall, the rate of providers with participation agreements has grown to 96 percent in 2011, up considerably from about 30 percent in 1986, two years after the start of the participating provider program (Figure 3). 4   As a result, across all states, most beneficiaries now encounter predictable expenses for Medicare-covered services, and are never responsible for Medicare’s portion of the fee (Appendix 1).

Figure 3: Strong incentives in Medicare have led to a high rate of “participating providers”

Medicare’s Balance Billing Limitations

Despite the incentives to become participating providers, a small share (4%) of physicians and practitioners who are registered with Medicare are non-participating providers. These providers can—on a service-by-service basis—charge patients in traditional Medicare higher fees than Medicare’s fee-schedule amount, up to a specified maximum. When charging higher fees, beneficiaries are responsible for the difference between Medicare’s approved amount and the providers’ total charge—essentially the balance of the bill remaining after accounting for Medicare’s reimbursement. This higher cost-sharing arrangement is called “balance billing” and means that the Medicare patient is financially liable for not only the applicable coinsurance and deductible, but also for any amount in which the provider’s charge exceeds Medicare’s assigned rate. Providers may not balance bill Medicare beneficiaries who also have Medicaid coverage. 5

When non-participating providers balance bill, they bill the beneficiary directly, typically for the full charge of the service—including Medicare’s share, applicable coinsurance and deductible, and any balance billed amount.  Non-participating providers are then required to submit a claim to Medicare, so that Medicare can process the claim and reimburse the patient for Medicare’s share of the charge.  Two Medigap insurance policies, which beneficiaries may purchase to supplement their Medicare coverage, include coverage for balance billing. 6   Balance billing is prohibited for Medicare-covered services in the Medicare Advantage program, except in the case of private fee-for-service plans.

In traditional Medicare, the maximum that non-participating providers may charge for a Medicare-covered service is 115 percent of the discounted fee-schedule amount. (Medicare’s fee-schedule rates for non-participating physicians are reduced by five percent.)  Accordingly, non-participating providers may bill Medicare patients up to 9.25 percent more than participating providers (i.e., 1.15 x 0.95= 109.25).  If the non-participating physician or practitioner balance bills the maximum amount permitted (not including any unmet deductible), total beneficiary liability for Medicare-covered services is about 33 percent of Medicare’s regular fee schedule amount (Figure 2).

Balance billing limitations were implemented in conjunction with the institution of Medicare’s physician fee-schedule in the Omnibus Budget Reconciliation Act of 1989.  At the time, Medicare’s charge-based methodology for physician services gave rise to rapid spending growth and confusion among beneficiaries about what charges they would face for physician services. 7 Moreover, high cost-sharing liabilities weighed disproportionately on beneficiaries who were sickest and used the most physician services. Despite physician reports that they took patient incomes into account when determining whether to charge higher-than Medicare rates, PPRC research did not find a relationship between beneficiary income and the probability that claims would be assigned. 8

While the Congress constrained growth in provider fees through the implementation of the fee schedule, it also implemented maximum “limiting charges” to establish further certainty and predictability for patients on their expected costs for services. In trying to rein in Medicare fee-schedule payments, the Congress sought to protect beneficiaries from excess charges that providers could otherwise impose in response to restrictions on their fees. 9

The continued desire to protect beneficiary spending during the implementation of the new physician fee schedule gave rise to the question of whether Congress might consider imposing even greater restrictions on balance billing or even mandate assignment (prohibiting balance billing) for all claims. 10 Ultimately, the rationale in Congress for allowing limited balance billing was that it would provide for:  (1) a “safety valve” for physicians who believed that the fee schedule did not adequately reflect the quality of services that they provided; (2) a means to correct any underpricing of resource costs in the fee schedule; and (3) necessary financial protections for beneficiaries, particularly in areas of the country where choice of physicians was limited. 11

As limits on balance billing were implemented and incentives for physicians and practitioners to take assignment took hold, beneficiary liability for balance billing declined dramatically.  CMS data show that in 2011, total balance billing amounted to $40 million, down significantly from $2.5 billion in 1983, (which equals $5.6 billion in 2011 dollars) (Figure 4).  Concurrently, the rate of assigned claims to total covered charges climbed from 51% in 1983 to 99% in 2011.

Figure 4: Balance billing in Medicare has declined significantly; almost all physician services are now paid on assignment

Private Contracting Conditions for Providers who Opt Out of Medicare

A very small share of providers (less than 1 percent of physicians) have elected to “opt out” of Medicare and contract privately with all of their Medicare patients, individually. 12 Their fees are not bound by Medicare’s physician fee schedule in any way, which means that these providers have no limits on the amounts they may charge beneficiaries for their services.  Medicare does not reimburse either the provider or the patient for any services furnished by opt-out providers.  Therefore, Medicare patients are financially responsible for the full charge of services provided by providers who have formally opted out of Medicare. 13

Serving as beneficiary protections, several important conditions exist for providers who elect to contract privately with Medicare patients. One condition is that prior to providing any service to Medicare patients, physicians and practitioners must inform their Medicare patients that they have opted out of Medicare and provide their Medicare patients with a written document stating that Medicare will not reimburse either the provider or the patient for any services furnished by opt-out providers. Their Medicare patients must sign this document to signify their understanding of it and their right to seek care from a physician or other practitioner who has not opted-out of Medicare.

Providers opt-out by submitting a signed affidavit to Medicare agreeing to applicable terms and affirming that their contracts with patients include all the necessary information.  Physicians or practitioners who opt out of Medicare must privately contract with all of their Medicare patients, not just some.  Once a physician or practitioner opts out of Medicare, this status lasts for a two-year period and is automatically renewed unless the physician or practitioner actively cancels it. 14   Providers may not enter into a private contract with a beneficiary who also has Medicaid benefits or who is experiencing an urgent or emergent health care event. 15

These conditions, which provide protections for both beneficiaries and the Medicare program, were included in the Balanced Budget Act of 1997 as part of the legislation that first codified physicians’ ability to privately contract with Medicare beneficiaries.  Requiring opt-out providers to privately contract for all services they provide to Medicare patients (rather than being able to select by individual patients or services) was intended to prevent confusion among Medicare patients as to whether or not each visit would be covered under Medicare and how much they could expect to pay out-of-pocket.  Similarly, requiring providers to opt out for a minimum period of time—two years—was intended to ensure that beneficiaries had consistent information to make knowledgeable choices when selecting their physicians.  Both of these provisions also addressed Medicare’s duty to guard against fraudulent billing in an administratively feasibly manner.  If, for example, physicians contracted with only some of their patients and/or services, Medicare would have to examine each contract for each submitted claim to discern which claims were eligible for Medicare reimbursement and which were not.

Previous Kaiser Family Foundation analysis shows that psychiatrists are disproportionately represented among the 0.7 percent of physicians (4,863) who have opted out of Medicare—comprising 42 percent of all physicians who have opted out (Figure 5). 16   Another 1,775 clinical professionals with non-physician doctorate degrees (i.e. oral surgeon dentists, podiatrists, and optometrists) also have opted-out of the Medicare program. 17 Dentists who are oral surgeons comprise the majority of this group (95%).  Earlier research that examined opt-out providers through 2002 found similarly low numbers of providers opting out (2,839) as well as relatively higher opt-out rates among psychiatrists compared with other specialties. 18

Some physician organizations attribute physician decisions to opt out of Medicare to frustration with Medicare’s fees and regulations. 19 Others have noted a similar trend in physician refusal to work with any insurers—including commercial insurance plans—especially in prosperous communities. 20 In these cases, providers require patients to pay them directly out-of-pocket, leaving the patient to seek reimbursement, if any, from their insurer.  For providers with patients who have the resources to make the payments, this billing method significantly reduces providers’ paperwork.

Concierge Practice Models

Some physicians are turning to concierge practice models (also called retainer-based care), in which they charge their patients annual membership fees and typically have smaller patient caseloads.  Physicians in a concierge practice model do not necessarily need to opt-out of Medicare to see Medicare patients.  However, if they do not opt-out of Medicare, these physicians are subject to Medicare’s balance billing rules, and therefore, cannot charge beneficiaries additional fees for services that are already covered by Medicare. 21 For example, the annual fee for a concierge practice may not be used for the yearly wellness visit covered by Medicare, but it could be applied to items such as a newsletter and high-end waiting room furniture.  More controversy exists about concierge practices applying annual fees paid by Medicare beneficiaries to enhanced appointment access and extra time with patients. 22

While anecdotal reports suggest a significant migration of primary care physicians to concierge/retainer practices, particularly in areas around Washington D.C and other major east and west coast cities, reliable data on the number of these practices are lacking.  In 2010, a report for MedPAC found listings for 756 concierge physicians, compared with 146 found by Government Accountability Office in 2005. 23   Other news articles have reported larger numbers (4,400 in 2012) according to the American Association of Private Physicians. 24

Implications of Proposals to Modify Incentives and Relax Certain Financial Protections—Pros and Cons

Proposals introduced by Rep. Tom Price, House Speaker Paul Ryan and others have sought to relax private contracting conditions either throughout the Medicare program or as a demonstration project that could be implemented by the Administration.  For example, in 2015, two Bills introduced in the House with a companion Bill in the Senate 25 include provisions to allow physicians and practitioners to engage in private contracting on a beneficiary-by-beneficiary basis, instead of requiring providers to opt-out of Medicare entirely. These Bills would also allow beneficiaries to seek Medicare reimbursement for the portion of the privately contracted fee that equals Medicare’s fee schedule amount, but no out-of-pocket limits would apply to the remaining portion of the provider’s charge.  Similar changes are also proposed as a demonstration in the 2016 House Republican Plan, “A Better Way, our Vision for a Confident America.” 26   An earlier House Bill also included a demonstration to allow non-participating providers to collect Medicare’s portion of their charge directly from Medicare. 27

Pros: Support for Relaxing restrictions and increasing physician autonomy

Proponents of such proposals, including the American Medical Association, support relaxing restrictions on balance billing and private contracting for a number of reasons—perhaps the foremost is that they would allow physicians to charge Medicare beneficiaries higher rates and thereby get relief from fees that they say have failed to keep pace with the rising costs of running their practices. 28   Proponents also assert that this ability could increase the overall number of providers willing to accept Medicare patients. This concern may be an issue in some geographic areas, though surveys and other data sources show that nationally, access to physicians among Medicare seniors is generally comparable to access among people age 55 to 64 with private insurance. 29

Physician groups also state that proposals to relax constraints on balance billing and private contracting would give providers a sense of greater autonomy in how they relate to both their patients and the Medicare program and would allow physicians to charge higher fees to some patients based on their assessment of their patients’ ability to pay. 30   Additionally, beneficiaries would be able to seek at least partial Medicare reimbursement for services they received under private contracts.  Proposals that would allow non-participating providers to collect Medicare’s portion of their charge directly from Medicare would obviate the need to charge patients the full fee upfront. This circumstance could be helpful to those patients who do not want to wait for Medicare’s reimbursement, even if on net, they would incur higher out-of-pocket liability due to balance billing.  Non-participating providers could also experience a more reliable payment from Medicare, compared with the challenges, in some cases, of collecting fees from Medicare patients for unassigned claims.

Cons: Concerns about Eroding Financial Protections

Other analysts have raised concerns about the effects of relaxing private contracting rules and balance billing restrictions. 31   To the extent that such changes lead to increases in the number of non-participating and/or opt-out providers, they could exacerbate problems that lower-income beneficiaries face when seeking care.  Beneficiaries without the ability to pay higher rates (who are also likely to be disproportionately sicker) could find a reduced pool of physicians willing to accept them. Also, for rarer physician specialties and in some geographic areas, such as rural parts of the country, patients may have little choice among physicians.  If the limits on balance billing and private contracting were relaxed, beneficiaries in these situations could face the types of problems that existed prior to the imposition of limits on balance billing—high out-of-pocket costs and greater confusion and uncertainty about possible charges.  Additionally, concerns have been raised about the accuracy and appropriateness of providers determining which Medicare patients in their caseload can afford higher fees, and by how much.

While proposals that allow beneficiaries and non-participating physicians to seek reimbursement from Medicare may, in the short term, reduce out-of-pocket liability for beneficiaries, they could also decrease the incentives for physicians and practitioners to become participating providers.  In the long run, if significantly more providers balance billed their Medicare patients or opted-out of Medicare, this shift could alternatively increase beneficiary out-of-pocket spending.

From the perspective of the Medicare’s program integrity, Medicare would have significant difficulty tracking fraud and abuse if physicians were able to contract selectively for services with some but not all beneficiaries.  Medicare would have to examine every physician-patient contract, on a claim-by-claim basis, to determine which claims could be reimbursed directly to the physician and which would be the full responsibility of the patient.  Additionally, Medicare would need to examine these physicians’ billing practices to ensure that beneficiaries were not being charged inappropriately.

Conclusions

Balance billing limits, with incentives for physicians to accept assignment, have proven effective in limiting beneficiaries’ out-of-pocket liability for physician services. Today, a small share of Medicare beneficiaries experience balance billing just as only small share of provider claims in Medicare are paid unassigned—very different from the years before balance billing limits were instituted.  Moreover, only about 1 percent of physicians provide services to beneficiaries on a private contracting basis.  As the Congress has been considering changes to the way in which Medicare pays for physician service in the context of SGR repeal, some proposals have briefly surfaced to relax constraints on balance billing and private contracting.

On the one hand, these proposals could increase physician autonomy and provider willingness to treat Medicare patients, particularly among those providers who charge higher fees. On the other hand, such proposals could result in higher out-of-pocket liability, particularly in the longer term, which could affect beneficiary access to care.  Additionally, relaxing these protections could foster less predictability in the fees beneficiaries encounter when seeing physicians and practitioners.  Patients most at risk for experiencing a greater financial burden would be those with modest incomes and greater health care needs.  Beneficiaries in geographic areas with limited choices of physicians might also be at higher risk if a growing number of providers choose to balance bill or require private contracts with their Medicare patients.  The key is to strike a balance between assuring that providers receive fair payments from Medicare while also preserving financial protections that help beneficiaries face more predictable and affordable costs when they seek care.

Technical support in preparation of this brief was provided by Health Policy Alternatives, Inc.

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What is Medicare assignment and how does it work?

Kimberly Lankford,

​Because Medicare decides how much to pay providers for covered services, if the provider agrees to the Medicare-approved amount, even if it is less than they usually charge, they’re accepting assignment.

A doctor who accepts assignment agrees to charge you no more than the amount Medicare has approved for that service. By comparison, a doctor who participates in Medicare but doesn’t accept assignment can potentially charge you up to 15 percent more than the Medicare-approved amount.

That’s why it’s important to ask if a provider accepts assignment before you receive care, even if they accept Medicare patients. If a doctor doesn’t accept assignment, you will pay more for that physician’s services compared with one who does.

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How much do I pay if my doctor accepts assignment?

If your doctor accepts assignment, you will usually pay 20 percent of the Medicare-approved amount for the service, called coinsurance, after you’ve paid the annual deductible. Because Medicare Part B covers doctor and outpatient services, your $240 deductible for Part B in 2024 applies before most coverage begins.

All providers who accept assignment must submit claims directly to Medicare, which pays 80 percent of the approved cost for the service and will bill you the remaining 20 percent. You can get some preventive services and screenings, such as mammograms and colonoscopies , without paying a deductible or coinsurance if the provider accepts assignment. 

What if my doctor doesn’t accept assignment?

A doctor who takes Medicare but doesn’t accept assignment can still treat Medicare patients but won’t always accept the Medicare-approved amount as payment in full.

This means they can charge you up to a maximum of 15 percent more than Medicare pays for the service you receive, called “balance billing.” In this case, you’re responsible for the additional charge, plus the regular 20 percent coinsurance, as your share of the cost.

How to cover the extra cost? If you have a Medicare supplement policy , better known as Medigap, it may cover the extra 15 percent, called Medicare Part B excess charges.

All Medigap policies cover Part B’s 20 percent coinsurance in full or in part. The F and G policies cover the 15 percent excess charges from doctors who don’t accept assignment, but Plan F is no longer available to new enrollees, only those eligible for Medicare before Jan. 1, 2020, even if they haven’t enrolled in Medicare yet. However, anyone who is enrolled in original Medicare can apply for Plan G.

Remember that Medigap policies only cover excess charges for doctors who accept Medicare but don’t accept assignment, and they won’t cover costs for doctors who opt out of Medicare entirely.

Good to know. A few states limit the amount of excess fees a doctor can charge Medicare patients. For example, Massachusetts and Ohio prohibit balance billing, requiring doctors who accept Medicare to take the Medicare-approved amount. New York limits excess charges to 5 percent over the Medicare-approved amount for most services, rather than 15 percent.

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How do I find doctors who accept assignment?

Before you start working with a new doctor, ask whether he or she accepts assignment. About 98 percent of providers billing Medicare are participating providers, which means they accept assignment on all Medicare claims, according to KFF.

You can get help finding doctors and other providers in your area who accept assignment by zip code using Medicare’s Physician Compare tool .

Those who accept assignment have this note under the name: “Charges the Medicare-approved amount (so you pay less out of pocket).” However, not all doctors who accept assignment are accepting new Medicare patients.

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What does it mean if a doctor opts out of Medicare?

Doctors who opt out of Medicare can’t bill Medicare for services you receive. They also aren’t bound by Medicare’s limitations on charges.

In this case, you enter into a private contract with the provider and agree to pay the full bill. Be aware that neither Medicare nor your Medigap plan will reimburse you for these charges.

In 2023, only 1 percent of physicians who aren’t pediatricians opted out of the Medicare program, according to KFF. The percentage is larger for some specialties — 7.7 percent of psychiatrists and 4.2 percent of plastic and reconstructive surgeons have opted out of Medicare.

Keep in mind

These rules apply to original Medicare. Other factors determine costs if you choose to get coverage through a private Medicare Advantage plan . Most Medicare Advantage plans have provider networks, and they may charge more or not cover services from out-of-network providers.

Before choosing a Medicare Advantage plan, find out whether your chosen doctor or provider is covered and identify how much you’ll pay. You can use the Medicare Plan Finder to compare the Medicare Advantage plans and their out-of-pocket costs in your area.

Return to Medicare Q&A main page

Kimberly Lankford is a contributing writer who covers Medicare and personal finance. She wrote about insurance, Medicare, retirement and taxes for more than 20 years at  Kiplinger’s Personal Finance  and has written for  The Washington Post  and  Boston Globe . She received the personal finance Best in Business award from the Society of American Business Editors and Writers and the New York State Society of CPAs’ excellence in financial journalism award for her guide to Medicare.

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There's no one-size-fits-all answer as to whether or not a PT should accept Medicare assignment, but you can better understand your options.

There's no one-size-fits-all all answer as to whether or not a PT should accept Medicare assignment, but you can better understand your options.

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Discuss any topic within rehab therapy, and chances are that Medicare will come up at some point. Whether it’s talking about Medicare and direct access or Medicare supervision requirements , it’s hard to avoid discussing the ins and outs of the program, given its prominence in healthcare at large. However, there’s one question that probably doesn't get asked enough: do providers have to participate in Medicare? We’re going to dive into the specifics of what rehab therapists can and can’t do when it comes to accepting Medicare assignment, and the pros and cons of each.  

What it means to “accept Medicare assignment”

In short, accepting Medicare assignment means signing a contract to accept whatever Medicare pays for a covered service as full payment. Participating and non-participating status only applies to Medicare Part B; Medicare Advantage plans operate with contracts similar to commercial insurance with in-network and out-of-network providers. 

Participating Providers

If you’re accepting Medicare assignment for all covered services, you are considered to be a participating provider under Medicare and may not charge patients above and beyond what Medicare agrees to pay. In this case, you can charge 100% of the Medicare Physician Fee Schedule (MPFS) and are paid at 80% of that rate, minus the Multiple Procedure Payment Reduction (MPPR) and the 2% sequestration adjustment.   

You may, however, collect patient deductibles and coinsurances—although, as explained in the Medicare payer guide , these providers typically ask Medicare to pay its share before collecting anything from the patient. Per the same resource, these providers are required to submit claims directly to Medicare for reimbursement and cannot charge patients for the claim submission. As Dr. Jarod Carter, PT, DPT, MTC, writes in Medicare and Cash-Pay PT Services , “This is the most common and best-understood relationship that physical therapists have with Medicare.”

Because Medicare beneficiaries often pay less out-of-pocket costs when receiving care from a provider who accepts assignment, patients may be more willing to work with these providers. Thus, if you accept assignment, you may have access to not only more Medicare patients but also more potential referral partners who only work with assignment-accepting providers. 

You must accept whatever Medicare deems appropriate compensation, and as we know, that’s below market value more often than not. Given the recently announced cuts to assistant-provided services and the 8% cut to all physical therapy services , accepting assignment may be increasingly less appealing to physical therapists. That said, if you serve a large Medicare population, the volume of patients you see may make it financially beneficial for you to continue playing by Medicare’s rules.

If you don’t want to accept Medicare assignment, what are your other options?

Non-participating providers.

As Meredith Castin explains in 4 Things to Know About Billing for Cash-Pay PT , Medicare also allows physical therapists to be non-participating providers (a.k.a. non-enrolled providers), which simply means that, while they are still in a contractual relationship with Medicare (and thus, are eligible to provide covered services to Medicare beneficiaries), they have not agreed to accept assignment across the board. 

If a non-participating provider opts to accept assignment for a case, they can charge 95%. 

If they do not accept assignment but still treat the patient, these providers may charge up to what Medicare calls “the limiting charge” for a service—which is 15% above the Medicare allowed amount.  Non-participating providers may choose to accept assignment for some services, but not others —or no services at all. For services that are not under assignment, the provider may collect payment directly from the patient; however, he or she must still bill Medicare, so that Medicare may reimburse the patient.

Non-participating providers are still eligible to serve Medicare beneficiaries, but they maintain some degree of freedom when it comes to pricing their services. In other words, if you are a non-participating provider, you are less beholden to what Medicare deems as appropriate payment than you are as a participating provider.

That said, you do still have to charge within Medicare’s limit, which means your freedom is far from total. Additionally, because patients may have to pay more out of pocket for your services and/or pay and wait for reimbursement from Medicare, you may have to work harder to convince them that you’re worth the financial investment. With the right data and marketing , it’s definitely doable; it may just require more effort.

No Relationship with Medicare

Physicians are eligible to “opt-out” of Medicare, which means that even if they are neither participating nor non-participating providers, they can still see Medicare beneficiaries on a cash-pay basis. Physical therapists do not enjoy the same privilege. So, if you decide not to be a Medicare participating provider or non-participating provider, then you effectively have no relationship with Medicare. Thus, you are not able to provide Medicare-covered services to Medicare beneficiaries. 

That said, all physical therapists, regardless of their relationship with Medicare, may provide never-covered services to Medicare beneficiaries, including wellness services. According to Castin, though, providers who go down that route, “need to be very clear about Medicare’s definition of ‘wellness services’ versus ‘physical therapy services.’” According to cash-pay PT Jarod Carter , it’s imperative for your documentation to clearly support that the services were indeed wellness as opposed to therapy. 

As a provider with no relationship with Medicare, you’re not required to play by Medicare’s rules when it comes to reporting requirements or (lowball) payments. You’re also not at all affected by Medicare’s most recent cuts, which, quite frankly, is a big bonus.

However, as of 2007 , 15% of the US population was enrolled in Medicare; that’s 44 million people—most of whom could benefit from seeing a physical therapist to improve function and mobility and decrease pain. And that number is projected to grow to 79 million people by 2030. As such, choosing not to play ball with Medicare means you’re walking away from a very large market of patients who need your services. 

It’s your decision.

Deciding on accepting Medicare assignment—and what type of relationship you’d like to have with Medicare—is not an easy decision to make, and there are a lot of factors to take into consideration before getting involved or breaking it off with this substantial federal payer. That said, it is important to know that you have options. Have more questions about what it means to accept assignment as a PT? Ask them below, and we’ll do our best to find you an answer.

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What You Need to Know About Medicare Assignment

If you are one of the more than 63 million Americans enrolled in Medicare and are on the lookout for a new provider, you may wonder what your options are. A good place to start? Weighing the pros and cons of choosing an Original Medicare plan versus a Medicare Advantage plan—both of which have their upsides.

Let’s say you decide on an Original Medicare plan, which many U.S. doctors accept. In your research, however, you come across the term “Medicare assignment.” Cue the head-scratching. What exactly does that mean, and how might it affect your coverage costs?

What is Medicare Assignment?

It turns out that Medicare assignment   is a concept you need to understand before seeing a new doctor. First things first: Ask your doctor if they “accept assignment”—that exact phrasing—which means they have agreed to accept a Medicare-approved amount as full payment for any Medicare-covered service provided to you. If your doctor accepts assignment, that means they’ll send your whole medical bill to Medicare, and then Medicare pays 80% of the cost, while you are responsible for the remaining 20%.

A doctor who doesn’t accept assignment, however, could charge up to 15% more than the Medicare-approved amount for their services, depending on what state you live in, shouldering you with not only that additional cost but also your 20% share of the original cost. Additionally, the doctor is supposed to submit your claim to Medicare, but you may have to pay them on the day of service and then file a reimbursement claim from Medicare after the fact.

Worried that your doctor will not accept assignment? Luckily, 98% of U.S. physicians who accept Medicare patients also accept Medicare assignment, according to the U.S. Centers for Medicare & Medicaid Services (CMS). They are known as assignment providers, participating providers, or Medicare-enrolled providers.

It can be confusing. Here’s how to assess whether your provider accepts Medicare assignment, and what that means for your out-of-pocket costs:

The 3 Types of Original Medicare Providers

1. participating providers, or those who accept medicare assignment.

These providers have an agreement with Medicare to accept the Medicare-approved amount as full payment for their services. You don’t have to pay anything other than a copay or coinsurance (depending on your plan) at the time of your visit. Typically, Medicare pays 80% of the cost, while you are responsible for the remaining 20%, as long as you have met your deductible.

2. Non-participating providers

“Most providers accept Medicare, but a small percentage of doctors are known as non-participating providers,” explains Caitlin Donovan, senior director of public relations at the National Patient Advocate Foundation (NPAF) in Washington D.C. “These may be more expensive,” she adds. Also known as non-par providers, these physicians may accept Medicare patients and insurance, but they have not agreed to take assignment Medicare in all cases. That means they’re not held to the Medicare-approved amount as payment in full. As a reminder, a doctor who doesn’t accept assignment can charge up to 15% more than the Medicare-approved amount, depending on what part of the country you live in, and you will have to pay that additional amount plus your 20% share of the original cost.

What does that mean for you? Besides being charged more than the Medicare-approved amount, you might also be required to do some legwork to get reimbursed by Medicare.

• You may have to pay the entire bill at the time of service and wait to be reimbursed 80% of the Medicare-approved amount. In most cases, the provider will submit the claim for you. But sometimes, you’ll have to submit it yourself.
• Depending on the state you live in, the provider may also charge you as much as 15% more than the Medicare-approved amount. (In New York state, for example, that add-on charge is limited to 5%.) This is called a limiting charge—and the difference, called the balance bill, is your responsibility.

There are some non-par providers, however, who accept Medicare assignment   for certain services, on a case-by-case basis. Those may include any of the services—anything from hospital and hospice care to lab tests and surgery—available from any assignment-accepting doctor, with a key exception: If a non-par provider accepts assignment for a particular service, they cannot bill you more than the regular Medicare deductible and coinsurance amount for that specific treatment. Just as it’s important to confirm whether your doctor accepts assignment, it’s also important to confirm which services are included at assignment.

3. Opt-out providers

A small percentage of providers do not participate in Medicare at all. In 2020, for example, only 1% of all non-pediatric physicians nationwide opted out, and of that group, 42% were psychiatrists. “Some doctors opt out of providing Medicare coverage altogether,” notes Donovan.“In that case, the patient would pay privately.” If you were interested in seeing a physician who had opted out of Medicare, you would have to enter a private contract with that provider, and neither you nor the provider would be eligible for reimbursement from Medicare.

How do I know if my doctor accepts Medicare assignment?

The best way to find out whether your provider accepts Medicare assignment is simply to ask. First, confirm whether they are participating or non-participating—and if they are non-participating, ask whether they accept Medicare assignment for certain services.

Also, make sure to ask your provider exactly how they will be billing Medicare and what charges you might expect at the time of your visit so that you’re on the same page from the start.

Is seeing a non-participating provider who accepts Medicare assignment more expensive?

The short answer is yes. There are usually out-of-pocket costs after you’re reimbursed. But it may not cost as much as you think, and it may not be much more than if you see a participating provider. Still, it could be challenging if you’re on a fixed income.

For example, let’s say you’re seeing a physical therapist who accepts Medicare patients but not Medicare assignment. Medicare will pay $95 per visit to the provider; but your provider bills the service at $115. In most states, you’re responsible for a 15% limiting charge above $95. In this case, your bill would be 115% of $95, or $109.25.

Once you get your $95 reimbursement back from Medicare, your cost for the visit—the balance bill—would be $14.25 (plus any deductibles or copays) .

In some states, the maximum cap on the limiting charge is less than 15%. As mentioned earlier, New York state, for instance, allows only a 5% surcharge, which means that physical therapy appointment would cost you just $4.75 extra.

Bottom line: Medicare assignment providers and non-participating providers who agree to accept Medicare assignment are both viable options for patients. So if you want to see a particular provider, don’t rule them out just because they’re non-par.

While seeing a non-participating provider may still be affordable, ultimately, the biggest headache may be keeping track of claims and reimbursements, or simply setting aside the right amount of money to pay for your visit up front.

Before you schedule a visit, be sure to ask how much the service will cost. You can also estimate the payment amount based on Medicare-approved charges. A good place to start is this  out-of-pocket expense calculator  provided by the CMS.

What if I see a provider who opts out of Medicare altogether?

An opt-out provider will create a private contract with you, underscoring the terms of your agreement. But Medicare will not reimburse either of you for services.

Seeing a provider who does not accept Medicare will likely be more expensive. And your visits won’t count toward your deductible. But you may be able to work out paying reduced fees on a sliding scale for that provider’s services, all of which would be laid out in your contract.

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Provider Assignment

On this page:, provider nomination and the geographic assignment rule.

• Part A and Part B (A/B) and Home Health and Hospice (HH+H)
• Durable Medical Equipment, Prosthetics, Orthotics, and Supplies (DMEPOS)
• Specialty Providers and Demonstrations
• Railroad Retirement Beneficiaries Entitled to Medicare
• Qualified Chains
• Out-of-Jurisdiction Providers (OJP)

Section 911(b) of the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (MMA), Public Law 108-173 , repealed the provider nomination provisions formerly found in Section 1816 of the Title XVIII of the Social Security Act and replaced it with the Geographic Assignment Rule.  Generally, a provider or supplier will be assigned to the Medicare Administrative Contractor (MAC) that covers the state where the provider or supplier is located. The Center for Medicare & Medicaid Services’ (CMS) has defined the following approach for assigning providers, physicians, and suppliers to MACs.

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Part A/Part B (A/B) and Home Health and Hospice (HH+H) Rule

All A/B and HH+H providers will be assigned to the MAC contracted by CMS to administer A/B and HH+H claims for the geographic locale in which the provider is physically located.  Learn more about the current A/B MAC jurisdictions and HH+H areas and view the corresponding maps at Who are the MACs.

Durable Medical Equipment, Prosthetics, Orthotics, and Supplies (DMEPOS) Rule

Each DMEPOS supplier submits claims to the DME MAC contracted by CMS to administer DMEPOS claims for the geographic locale in which the beneficiary resides permanently.  Learn more about the current DME MAC jurisdictions and view the corresponding map at Who are the MACs.

Specialty Providers and Demonstrations Rule

Specialty providers and providers involved with certain demonstrations will submit claims to a specific MAC designated by CMS.  Learn more about a specific A/B MAC or DME MAC and view the corresponding maps at Who are the MACs .

Railroad Retirement Beneficiaries Entitled to Medicare Rule

Physicians and other suppliers (except for DMEPOS suppliers) will continue to enroll with and bill the contractor designated by the Railroad Retirement Board for Part B services furnished to their beneficiaries.  Each DMEPOS supplier will submit claims to the DME MAC contracted by CMS to administer DMEPOS claims for the geographic locale in which the beneficiary resides permanently.  Learn more about the current DME MAC jurisdictions and view the corresponding map at W ho are the MACs.

Qualified Chains Rule

The Geographic Assignment Rule states that generally, a provider or supplier will be assigned to the MAC that covers the state where the provider or supplier is located.  However, it does provide an exception for qualified chains.  A qualified chain home office may request that its hospitals and skilled nursing facilities be serviced by the A/B MAC that covers the state where the home office is located.  A qualified chain home office may send an inquiry to:   CMS [email protected]

Out-of-Jurisdiction Providers (OJP) Rule

An OJP is a provider that is not currently assigned to an A/B MAC in accordance with the geographic assignment rule and the qualified chain exception.  For example, a hospital not part of a qualified chain located in Maine, but currently assigned to the A/B MAC in Jurisdiction F would be an OJP.

Each A/B MAC will initially service some OJPs until CMS undertakes the final reassignment of all OJPs to their destination MACs based on the geographic assignment rule and its exceptions.

CMS has not set a timetable for moving OJP’s.

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Projected lineup: Rangers captain Jacob Trouba ready to accept any assignment

TARRYTOWN - The Rangers' depth on defense isn't lost on Jacob Trouba.

In fact, the captain ranks this defensemen group with any he's played with across his 11 NHL seasons.

"It's one of the best D corps I've ever been a part of in the league, I would say," he said following Monday's morning skate at the MSG Training Center. "(Braden Schneider) has been playing great. (Zac Jones) stepped in and played some excellent hockey. Chad (Ruhwedel) has come in and played well when he's been in. It’s across the board."

The late-season emergence of Jones and the trade addition of Ruhwedel, on top of the six regular defensemen they've used most of the season, means these Blueshirts go at least eight deep on the blue line.

That came in handy while Trouba, Ryan Lindgren and Erik Gustafsson dealt with recent injuries, and it'll be especially important if the injury bug strikes in the upcoming playoffs. But with Lindgren and Trouba returning from their lower-body ailments in the last couple games, plus Gustafsson skating with the team in a red non-contact jersey Monday for the first time since being elbowed in the head on Mar. 23, the lineup squeeze is underway.

Through that process, it's become clear that head coach Peter Laviolette prefers to enter the postseason with the standard pairs he's leaned on much of the season − Trouba with K'Andre Miller, Lindgren with Adam Fox, and Gustafsson with Schneider − despite the success of some fresh-looking combinations used in recent weeks.

"I don't want to ever say anything, like, ‘Bring out your pen and write it down,’" Laviolette said. "There's always possibility of change inside of the game or going into a game or going into a series based on what you think you might need in order to be successful. But right now, I think it's been good that there's been a sense of just quiet with regard to the lineup and the movement that comes with that. Guys have gotten used to each other, familiar with each other, and been able to establish some chemistry with each other. With the exception of the odd change and injury, it’s been pretty much status quo."

The most consistent pair in Trouba's absence featured Miller and Schneider, who both responded well to the added responsibility . Schneider, in particular, showed that he may be ready to graduate from the bottom-pair role where he's spent the majority of his first three seasons.

Trouba, who's formed a tight bond with the 22-year-old teammates call "Baby Troubs," is among Schneider's biggest advocates.

"I don’t think you'll find anyone that’s more happy for him than me, with just everything that he's worked for the last couple of years and his growth and how he comes to the rink every day," he said. "He got an opportunity and he played really well. That's good for the Rangers going forward."

Postgame takeaways: Jonathan Quick highlights win filled with milestones

There was a palpable confidence and assertiveness emanating from Miller and Schneider during Trouba's 11-game absence, both defensively as they drew some of the most difficult matchups and offensively as they each picked the right spots to jump ahead in the rush.

Some fans have clamored for the two young defensemen to stay together, but Laviolette indicated that wasn't much of a consideration when Trouba returned for Saturday's 8-5 win in Arizona.

"I think that Key and Troubs have been a really good pair the entire year," he said that day.

Miller and Trouba have certainly improved from last season, when they were among the NHL's most scored-upon duos. Their average goals against per 60 minutes has dropped from 2.95 to 2.44, according to moneypuck.com, which is actually better than the 2.8 posted by the Miller-Schneider pair. The same goes for their 47.7% xGF, compared to 46% when Miller plays with Schneider.

Those numbers reinforce the recency bias that may be skewing the current debate, particularly after Trouba's somewhat rusty return on Saturday.

"I thought he looked like Trouba," said Laviolette, who threw the captain into the fire with 22:29 time on ice against the Coyotes. "He was trying to compete. He was trying to battle inside of things. When guys come out for a month, I think it takes a minute to get back to where you were. I have no doubt that he’ll continue to get better."

If it takes too long for the 30-year-old to get up to speed, the cries for Miller and Schneider will grow louder − and at least now Laviolette knows it can work in a pinch, if necessary. But we also know this coach places a high value playing with an "edge," which he described as "the puck battle between you and somebody else and how quick you get there, and then your fight inside of that battle."

There's no question that Trouba infuses those gritty elements as well as anyone on the roster, which is why it's unlikely for his role to change any time soon. But if it ever came to that, credit No. 8 for this: He sounds ready and willing to accept any assignment.

"I don't think you're ever really glued to a partner," Trouba said. "You’re one injury away from everything being been shaken up. So, I think it's good in a way to be able to play with multiple guys and not be stuck in your ways with one person. It's no different than forward lines. They get jumbled sometimes, and you’ve got to kind of find ways to play with other players. At the end of the day, it's still hockey and you’re just playing your game."

NY Rangers (50-20-4) projected lineup: Game 75 vs. Pittsburgh Penguins (32-30-11)

When: Monday, Apr. 1 at 7 p.m.

Where:   Madison Square Garden

TV/Radio:  MSG Network/98.7 FM

Top line  ⊳ Chris Kreider (LW) ⋄ Mika Zibanejad (C) ⋄ Jack Roslovic (RW)

Second line  ⊳ Artemi Panarin (LW) ⋄ Vincent Trocheck (C) ⋄ Alexis Lafrenière (RW)

Third line  ⊳ Jonny Brodzinski (LW) ⋄ Alex Wennberg (C) ⋄ Kaapo Kakko (RW)

Fourth line  ⊳ Will Cuylle (LW) ⋄ Barclay Goodrow (C) ⋄ Jimmy Vesey (RW)

Top pair  ⊳ Ryan Lindgren (L) ⋄ Adam Fox (R)

Second pair  ⊳ K'Andre Miller (L) ⋄ Jacob Trouba (R)

Third pair  ⊳ Zac Jones (L) ⋄ Braden Schneider (R)

Starter  ⊳ Igor Shesterkin

Backup  ⊳ Jonathan Quick

Healthy scratch:  F Matt Rempe , D Chad Ruhwedel and D Brandon Scanlin

Injured: D Erik Gustafsson (upper body)

Long-term injured reserve:  F Filip Chytil (upper body) and F Blake Wheeler (lower body)

Vincent Z. Mercogliano is the New York Rangers beat reporter for the USA TODAY Network. Read more of his work at  lohud.com/sports/rangers/  and follow him on Twitter  @vzmercogliano .

The bundled task assignment problem in mobile crowdsensing: a lagrangean relaxation-based solution approach

• Published: 02 July 2024

Cite this article

• Ali Amiri   ORCID: orcid.org/0000-0001-9538-1245 1  

This paper studies the Bundled Task Assignment Problem in Mobile Crowdsensing (BTAMC), a significant extension of the traditional Task Assignment Problem in Mobile Crowdsensing (TAMC). Unlike TAMC, BTAMC introduces a more realistic scenario where requesters present bundles of two tasks to the platform, giving the platform the flexibility to accept both tasks, accept one, or reject both. This added complexity reflects the multifaceted nature of task assignment in mobile crowdsensing. To address the challenges inherent in BTAMC, we examine two pricing strategies—discount and premium pricing—available to platform operators for pricing task bundles. Additionally, we delve into the critical issue of task quality, emphasizing the quality of workers assigned to each task. This is achieved by ensuring that the overall quality of workers assigned to each task consistently meets a predefined quality threshold, which, in turn, offers a more favorable outcome for all task requesters. The paper presents an integer programming formulation for the BTAMC. This formulation serves as the foundation for a Lagrangean-based solution approach, which has proven to be remarkably effective. Notably, it provides near-optimal solutions even for instances considerably larger than those traditionally encountered in the literature. These contributions offer valuable insights for platform operators and stakeholders in the mobile crowdsensing domain, presenting opportunities to augment profitability and enhance system performance.

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Amiri, A. The bundled task assignment problem in mobile crowdsensing: a lagrangean relaxation-based solution approach. Inf Technol Manag (2024). https://doi.org/10.1007/s10799-024-00432-3

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Accepted : 21 June 2024

Published : 02 July 2024

DOI : https://doi.org/10.1007/s10799-024-00432-3

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