What are Medicare Part B excess charges?

Medicare Part B excess charges are extra fees charged by a doctor, provider or supplier that doesn't accept Medicare assignment. These out-of-pocket costs can be up to 15% more than the Medicare-approved amount for the service provided.1

Here are some details to help explain Medicare Part B excess charges. 

Key points

  • Part B excess charges can be as high as 15% of the Medicare-approved amount for a service.
  • 8 states don’t allow Part B excess charges: Connecticut, Massachusetts, Minnesota, New York, Ohio, Pennsylvania, Rhode Island and Vermont.
  • You can avoid Part B excess charges by getting care from Medicare-approved providers who accept assignment.

What is Medicare Part B?

Medicare Part B, also known as medical insurance, is the second part of Original Medicare. (Part A is the other.) Part B offers coverage for doctor visits and outpatient care. Some examples of what Part B covers include: 

How much are Part B excess charges?

There’s no set price for Part B excess charges. The cost will depend on the service you receive and how much your doctor charges you. However, you can only be charged up to 15% of the Medicare-approved amount for a service.1

For example—Let’s say you get a service that Medicare pays $500 to perform. If your doctor doesn’t accept Medicare assignment and bills you the full 15%, your excess charge will be $75. 

Which states prohibit Medicare Part B excess charges?

Here are the 8 states that don’t allow Part B excess charges:

  • Connecticut
  • Massachusetts
  • Minnesota
  • New York
  • Ohio
  • Pennsylvania
  • Rhode Island
  • Vermont

If you live in 1 of these states, you’re protected from excess charges if you get medical care in your home state. If you get medical care outside of your home state, you can still be charged Part B excess charges. 

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Can I appeal Medicare Part B excess charges?

Yes, in some cases. As with any Medicare billing appeal, be sure to have all your documentation ready. This includes the excess charge, the Medicare-approved amount and the code for the service you received. Then, contact your Medicare carrier to file an appeal. 

Does Medigap cover Part B excess charges?

A Medicare Supplement Insurance plan, also known as Medigap, can help pay out-of-pocket costs that Original Medicare doesn’t cover. There are 2 Medigap plans that cover Part B excess charges—Plan F and Plan G. Plan F is only available to Medicare beneficiaries who were eligible for Medicare before Jan. 1, 2020.

How to avoid Medicare Part B excess charges

The best way to avoid Part B excess charges is to only get care from Medicare-approved providers who accept assignment. Ask if they accept assignment before scheduling your service to be 100% sure.

Learn more about Medicare costs

Overall, Part B excess charges aren’t common and can be avoided. To learn more about deductibles, premiums and common out-of-pocket costs, check out these articles on Medicare costs.

Frequently asked questions

1. Do Medicare Part B excess charges count toward your Part B deductible?

No. Part B excess charges don’t count toward your Part B deductible ($257 in 2025).

2. Does Medicare Supplement Insurance Plan N cover Part B excess charges?

No. Only Plan F and Plan G cover Part B excess charges. 

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Source

  1. Does your provider accept Medicare as full payment?,” Medicare.gov, last accessed Nov. 13, 2024.