If your statement shows a credit balance, or a minus sign before the amount, you've paid more than you owe, and you can ask for a refund. It can happen when you pay at the visit and then Medicare, a Medigap plan, or other insurance pays more than expected. For hospitals, nursing homes, and other providers with Medicare agreements, federal rules say prompt refund is the preferred way to handle amounts collected from you that Medicare didn't allow.
How does a credit balance happen?
Common ways:
- You paid at the visit before Medicare processed the claim, and Medicare's approved amount was lower.
- Your Medigap plan or other coverage paid your share after you'd already paid it.
- You paid a bill twice, like once by check and once online.
- The provider changed or corrected a charge after you paid.
- You got Medicare coverage back-dated after paying as if you had none.
How do I know I overpaid?
Look for:
- A balance shown as a negative number, like "-$45.00" or "($45.00)."
- The words "credit balance," "overpayment," or "amount due to you."
- A $0 balance even though you made a recent payment.
Then compare with your Medicare Summary Notice (MSN). The MSN shows the most you may be billed. If you paid more than that, the difference may be yours. See maximum you may be billed.
If the provider accepts assignment, Medicare.gov says they agree to accept the Medicare-approved amount as full payment and can charge you only the deductible and coinsurance. So paying more than that can lead to a credit.
What do federal rules say about refunds?
Federal rules for providers with Medicare agreements (42 CFR 489.40 and 489.41) say:
- An "incorrect collection" is any amount collected from you, or someone paying for you, that Medicare rules don't allow.
- Prompt refund to you is the preferred way to handle it.
- If the provider can't refund within 60 days of the notice of incorrect collection, it must set the money aside in a separate account for you.
These rules apply only to providers that sign Medicare provider agreements, like hospitals, skilled nursing facilities, and home health agencies. They don't cover doctors' offices, but you can still ask a doctor's office to refund an overpayment.
How do I ask for a refund?
Call first, then put it in writing.
What to say on the phone:
"My statement for account [number] shows a credit balance of $[amount]. Can you confirm the amount and tell me how to request a refund? I'd like it sent to [me / the person who paid]."
What to put in writing:
"I'm requesting a refund of the $[amount] credit balance on account [number] for [patient name]. My Medicare Summary Notice for [date of service] shows the most I may be billed was $[amount], and I paid $[amount]. Please send the refund to [address] and confirm in writing."
Keep a copy and note the date.
Can the provider keep the credit for future visits?
Some offices offer to hold a credit for future bills. You can say yes if you'll be back soon. If you'd rather have the money:
"Thank you, but I'd prefer a refund instead of a credit on my account."
What if they don't respond?
- Call again after a few weeks and ask for the status.
- Ask for a supervisor or the patient accounts manager.
- Send a second letter referencing your first.
- Call 1-800-MEDICARE (1-800-633-4227) if you think you were charged more than Medicare allows and the provider won't fix it.
Your State Health Insurance Assistance Program (SHIP) can also help. Find yours at shiphelp.org.