What Medicare Excess Charges Are

A Medicare excess charge is the amount a doctor or other healthcare provider bills you above what Medicare allows them to charge. Medicare sets a maximum payment amount for each service — a doctor can accept that amount as full payment, or they can bill you for the difference. That difference is the excess charge, and it comes straight out of your pocket.

Not all doctors charge excess amounts. Many accept Medicare's allowed amount and do not bill patients for anything beyond what Medicare pays (after your deductible and coinsurance). But some providers, particularly those who do not participate in Medicare, can legally charge up to 15% more than Medicare's allowed amount. A few states have stricter limits, capping excess charges at a lower percentage.

The key distinction is whether your provider is participating (accepts Medicare's terms) or non-participating (does not have a contract with Medicare). Participating providers cannot charge excess amounts at all. Non-participating providers can, but only up to a limit set by federal law and sometimes by your state.

Key Takeaways

  • Excess charges are amounts doctors bill above Medicare's allowed payment, and only non-participating providers can charge them.
  • Federal law caps excess charges at 15% above Medicare's allowed amount, though some states set lower limits.
  • You can check whether a doctor participates in Medicare before your visit using the Medicare Provider Search tool on Medicare.gov.
  • If you receive an excess charge bill, you have the right to dispute it and report the provider to your state medical board or Medicare.
  • Medigap and Medicare Advantage plans may cover some or all excess charges, depending on your specific plan.

Participating Versus Non-Participating Providers

Participating providers sign a contract with Medicare agreeing to accept Medicare's allowed amount as payment in full (minus your deductible and coinsurance). They bill Medicare directly, and you pay only your share of the allowed amount. They cannot bill you for excess charges under any circumstance.

Non-participating providers do not have a Medicare contract. They can charge more than Medicare allows, but federal law limits them to 15% above the allowed amount. For example, if Medicare allows $100 for a service, a non-participating provider can charge you up to $115 — the extra $15 is the excess charge. You are responsible for the full bill, and you must submit it to Medicare yourself to get reimbursed for their portion.

Some non-participating providers opt out of Medicare entirely, meaning they do not bill Medicare at all and you cannot use your Medicare benefit with them. These providers can charge any amount they choose, but you will not receive any Medicare reimbursement. They must give you written notice of this arrangement before you receive care.

How to learn about Your Doctor Participates

The easiest way to check is to use the Medicare Provider Search tool on Medicare.gov. Enter your doctor's name or the facility name, and the search will tell you whether they are participating, non-participating, or opted out. You can also call Medicare directly at 1-800-MEDICARE (1-800-633-4227) and ask about a specific provider.

Before scheduling an appointment with a non-participating provider, ask them directly whether they will charge excess amounts and, if so, how much. Request an estimate in writing. This protects you from surprise bills and gives you time to decide whether to see that provider or find a participating one instead.

If you use a Medigap or Medicare Advantage plan, contact your plan to ask about coverage for excess charges before you see a non-participating provider. Some plans cover them fully, some cover part of them, and some do not cover them at all.

What Excess Charges Actually Cost You

The 15% federal cap means excess charges are limited but not eliminated. On a $100 allowed amount, the maximum excess charge is $15. On a $500 allowed amount, it is $75. These amounts add up quickly if you see multiple non-participating providers or need ongoing care.

Your Medicare supplement (Medigap) plan may cover excess charges depending on which plan you have. Plans C, D, G, M, and N offer some level of excess charge coverage, though the amount varies. Plans A, B, K, and L do not cover excess charges. If you have a Medicare Advantage plan, check your plan documents or call your plan to learn what excess charges, if any, are covered.

If you do not have supplemental coverage and see a non-participating provider who charges excess amounts, you pay the full excess charge yourself. This is separate from your deductible and coinsurance — it is money beyond what Medicare considers reasonable for that service.

Disputing an Excess Charge Bill

If you receive a bill for an excess charge that exceeds the 15% federal limit, you have the right to dispute it. First, contact the provider's billing office and ask for an explanation. Ask them to show you the calculation and Medicare's allowed amount for that service.

If the provider cannot justify the charge or if it exceeds 15% above the allowed amount, you can file a complaint with Medicare. Call 1-800-MEDICARE and explain the situation, or file a complaint online through the Medicare website. You can also report the provider to your state medical board or your state's attorney general office.

Keep copies of all bills, explanations of benefits (EOBs) from Medicare, and any written communication with the provider. These documents support your dispute and help Medicare investigate the complaint.

Protecting Yourself From Unexpected Excess Charges

Before any appointment or procedure with a non-participating provider, ask for an estimate in writing that includes the provider's charge, Medicare's allowed amount, what Medicare will pay, and what you will owe (including any excess charge). This gives you a clear picture of your costs upfront.

If the estimate shows a large excess charge, you have time to decide whether to proceed or find a participating provider instead. Many areas have multiple doctors and specialists — choosing a participating provider eliminates excess charge risk entirely.

Review your Medicare Advantage or Medigap plan documents to understand what excess charges, if any, your plan covers. If your plan does not cover them and you need care from a non-participating provider, factor the excess charge into your decision.

State-Specific Limits on Excess Charges

While federal law caps excess charges at 15%, some states have set their own lower limits. A few states do not allow excess charges at all, or allow them only in specific circumstances. Your state's limit applies to you regardless of the federal cap.

To find out what your state allows, contact your state medical board or your state's health department. You can also ask your doctor's office directly what their state's excess charge rules are. If you believe a provider has violated your state's excess charge law, report them to your state medical board.

Frequently Asked Questions

Can my doctor charge me an excess charge if I have a Medigap plan?

It depends on which Medigap plan you have. Plans C, D, G, M, and N cover some or all excess charges. Plans A, B, K, and L do not. Check your plan documents or call your plan to confirm your coverage before seeing a non-participating provider.

What is the difference between an excess charge and coinsurance?

Coinsurance is your share of Medicare's allowed amount — for example, 20% of what Medicare says the service costs. An excess charge is anything the provider bills above Medicare's allowed amount. They are separate costs, and you may owe both.

If I pay an excess charge, can I get reimbursed?

Not by Medicare — excess charges are not covered by Medicare itself. However, if your Medigap or Medicare Advantage plan covers excess charges, you can submit the bill to your plan for reimbursement. If your plan does not cover them, the excess charge is your responsibility.

Can a participating provider ever charge me an excess charge?

No. Participating providers agree to accept Medicare's allowed amount as full payment. They cannot bill you for excess charges under any circumstance. If a participating provider bills you an excess charge, report them to Medicare when ready.

How do I know if a provider is participating before I make an appointment?

Use the Medicare Provider Search tool on Medicare.gov, call 1-800-MEDICARE, or ask the provider's office directly. Always confirm their participation status before your visit so you know what to expect for costs.