How Medicare Claims Are Reported – the Medicare Summary Notice (MSN)

Medicare Claims are reported using Medicare Summary Notices (MSNs). If you are in Original Medicare, then you should receive a Medicare Summary Notice on a regular basis – every three months. It is NOT a BILL. It is a list of your claims for health care services provided by Original Medicare (Part A and Part B). It does not reflect any services rendered through Medicare Advantage, Part D or Medigap Plan.

In your MSN, Part A services are listed separately from Part B services.

Medicare Claims Reporting / Medicare Summary Notice (MSN) – Part A

  • Type of Service
    • Part A Hospital Insurance – Inpatient Claims
    • Part B Medical Insurance – Outpatient Facility Claims
  • Dates of Services
  • Claim Number
  • Benefit Days Used – Shows the number of days used in the benefit period
  • Non-covered Charges – Charges denied or excluded by Medicare
  • Deductible and Coinsurance – The amount applied to your deductible and coinsurance
  • You May Be Billed – The total amount the provider may bill you, including deductibles, coinsurance, and non-covered charges
  • Provider’s Name and Address
  • Deductible Information – How much of your deductible you have met for the benefit period
  • Appeals Information

Medicare Claims Reporting / Medicare Summary Notice (MSN) – Part B

  • Type of Service
    • Part B Medical Insurance – Assigned Claims
    • Part B Medical Insurance – Unassigned Claims
  • Claim Number
  • Provider’s Name and Address
  • Dates of Services
  • Amount Charged – Amount the provider billed Medicare
  • Medicare Approved – Amount Medicare approved for this service or supply
  • Medicare Paid Provider – Amount Medicare paid to the provider (for Assigned Claims)
  • Medicare Paid You – Amount Medicare paid to you (for Unassigned Claims)
  • You May Be Billed – The total amount the provider may bill you, including deductibles, coinsurance, and non-covered charges.
  • Deductible Information – How much of your yearly deductible you have met
  • Appeals Information

Normally the MSN is mailed four times a year. However, if you have paid out-of-pocket for a service from a provider that does not accept the assignment, you may get an additional MSN alongside a reimbursement check from Medicare. You also can access your MSN online at www.mymedicare.gov.

Do not throw out your MSNs. They are useful as proof that payment was made to the provider as well as for tax purposes.

To learn about Medicare claims processing, read How Medicare Claims Are Processed.

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