The last thing anyone wants is to go to a doctor they think is covered under their Medicare insurance, only to receive a hefty bill a few days later. You can avoid paying these high out-of-pocket costs by understanding Medicare’s assignment of benefits.

What Is Medicare Assignment of Benefits?

Medicare assignment of benefits is a way to identify providers who accept Medicare benefits and those who do not. These providers can be individual physicians, whole hospitals or various suppliers such as physical therapists who work independently. According to the Medicare website:

Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services.

This means that for Medicare to cover the entire cost of a covered service, you’ll need to go to a service provider who accepts assignment.

However, when seeing a provider who hasn’t agreed to accept assignment, you may not be liable for paying much out-of-pocket if you have Medicare Supplement Plan F or Medigap Plan G.

What Happens When Your Provider Accepts Assignment?

When your provider accepts assignment, they agree to receive the pre-approved amount Medicare has outlined for covered procedures as full payment. This reduces out-of-pocket costs and prevents the provider from charging you beyond what Medicare covers for certain services.

While you won’t be liable for paying the whole amount of the services received, Part 3 of the Medicare Carriers Manual states you will still be responsible for paying the deductible and 20 percent coinsurance.

Medicare Enrollment Options for Providers

There are three types of enrollment when referring to Medicare assignment:
  • Participating
  • Non-participating
  • Opt-out

Each entity can choose whether or not to participate in the Medicare program.

Medicare enrollment options

If a doctor at a local clinic doesn’t wish to participate, they can choose not to if they receive payments in their name. If they receive payments through the clinic, they will be at the mercy of the clinics’ decisions. For this reason, you can check with a clinic, hospital or other organization, or with individual doctors, dentists or chiropractors to find out who accepts assignment.

Most providers have the option to opt out of Medicare, but it’s important to note that chiropractors don’t have this option. If you need chiropractic services, the provider will always be either participating or non-participating.


As previously mentioned, participating providers sign an agreement to accept Medicare payments for covered services as payment in full. With participating providers, you’re likely to pay less out of pocket. Likewise, the provider can’t charge you when they submit a claim on your behalf.

Most Medicare beneficiaries will want to find a participating provider as this will lessen their overall health care costs.


Providers who haven’t signed an agreement to accept all Medicare-covered services are considered non-participating. A non-participating provider can choose to accept or not accept assignment on Medicare-covered services.

If your provider is non-participating, you could be liable for the entire amount of your services. Additionally, service providers can charge you up to 15 percent more than the Medicare-approved amount, even when they accept assignment for a specific service. Supplemental insurance, such as Medigap Plan F or G will likely cover the extra 15 percent. However, if you don’t have such insurance, you’ll have to pay the additional 15 percent out-of-pocket.


Though rare, opt-out providers choose not to accept Medicare as a payment option. In most states, less than 3 percent of providers fall into this category, according to the Kaiser Family Foundation. Medicare doesn’t cover any services by a provider who has opted out of the Medicare program.

If you choose to see an opt-out provider, you’ll have to pay the charges yourself. You can sign a contract with the payment terms directly with the service provider.

Provider cost benefit

How Do I Know If a Provider Accepts Medicare Assignment?

You can find a provider that accepts Medicare assignment by using Medicare’s care comparison tool. After searching for types of providers, specific doctors or specialties, it will show you a list of participating providers in your region and directions to each facility. It will also give you the option to compare providers.

If you’re looking for a new provider after moving out of state or because you need different care, it’s important to find a provider who accepts assignment. This can help lower or eliminate your health care costs, allowing you to use your money for those long-awaited post-retirement plans. Providers who accept assignment will also accept Medigap insurance coverage.

Knowing if a provider accepts your Medicare assignment can decrease your stress and improve your overall experience with the doctor, hospital or the like. You can receive your needed services confidently knowing what you’ll have to pay and what Medicare will cover on your behalf.

While understanding your service provider’s stance on Medicare can help you save money, keeping yourself healthy is one of the best ways to reduce your medical expenses. This is true whether your provider is participating, non-participating or opt-out. Use the visual below as a guide for things you can do to take care of your body and avoid seeing the doctor too often.

Medicare assignment explained infographic

Download Infographic button

Last Modified: August 31, 2021

7 Cited Research Articles

  1. Neuman, T., Ochleng, N., Schwartz, K. (2020, October 22). How Many Physicians Have Opted-Out of the Medicare Program? Retrieved from:
  2. Kupka, N. (2018, March 8). 10 Things to Do to Prepare for a Medicare Wellness Visit. Retrieved from:
  3. California Health Advocates. (2017, May 16). Medicare Assignment and Costs. Retrieved from:
  4. Centers for Medicare and Medicaid. (2015, March). Misinformation on Chiropractic Services. Retrieved from:
  5. Centers for Medicare and Medicaid Services. (2003, July 11). Medicare Carriers Manual. Retrieved from:
  6. (n.d.) Lower costs with assignment. Retrieved from:
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