How to Read a Medicare Summary Notice

The Medicare Summary Notice is the document Medicare sends to beneficiaries explaining how claims for their medical services were processed. It is not a bill. Understanding what it shows helps you verify that claims were processed correctly and catch errors before they become billing disputes.

When you receive an MSN

Medicare sends paper MSNs quarterly if you have had claims activity during the quarter. You can view MSNs online at any time through your Medicare account at medicare.gov or through the MyMedicare.gov portal. Electronic MSNs are available immediately when claims are processed rather than waiting for the quarterly paper mailing.

Reading the MSN sections

The MSN header identifies your name, Medicare number, and the period covered. Review the Medicare number against your Medicare card to confirm the document is yours.

The claims section lists each provider, the date of service, the service description, the amount billed, the Medicare-approved amount, the amount Medicare paid, and your responsibility. The Medicare-approved amount is the fee schedule amount, not the billed amount. Your responsibility is your deductible, coinsurance, or copay amount.

The notes section explains any claim adjustments using codes and descriptions. Denial codes appear here with explanations of why a service was not covered or was adjusted.

What to look for

Verify that you recognize every provider and date of service. A claim for a provider you do not recognize could indicate billing fraud or identity theft involving your Medicare number.

Confirm that the services described match what you actually received. Review your dates of service against the MSN dates.

Check whether your deductible and coinsurance amounts have been applied correctly. The MSN shows your year-to-date deductible accumulation.

If something looks wrong

If you believe a claim was processed incorrectly, contact the provider's billing office first. If the provider cannot resolve it, call Medicare at 1-800-MEDICARE. If a claim was denied that you believe should be covered, you have the right to appeal. The MSN includes information about your appeal rights and deadlines.

Report suspicious claims or providers you do not recognize to the Medicare fraud hotline at 1-800-HHS-TIPS or through the Senior Medicare Patrol program.

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Bill Advantage is a document literacy tool. Nothing in this article constitutes legal or medical advice.