Medicare Summary Notice (MSN)

What is it?

If you have Original Medicare, you'll get a "Medicare Summary Notice" (MSN) in the mail every 3 months for Medicare Part A and Part B-covered services.

The notice shows all your services or supplies that providers and suppliers billed to Medicare during the 3-month period, what Medicare paid, and what you may owe the provider. This notice isn't a bill.

When should I get it?

Every 3 months you get a Medicare-covered service

Do you want to see your claims right away?  If you don’t want to wait for your MSN, you can access your Original Medicare claims at You’ll usually be able to see a claim within 24 hours after Medicare processes it. You can also use the Blue Button feature to help keep track of your personal health records.

If I need to change my address:

Contact Social Security.

If you get RRB benefits, contact the RRB.

Who sends it?


What should I do if I get this notice?

  • If you have other insurance, check to see if it covers anything that Medicare didn’t.
  • Keep your receipts and bills, and compare them to your MSN to be sure you got all the services, supplies, or equipment listed.
  • If you paid a bill before you got your notice, compare your MSN with the bill to make sure you paid the right amount for your services.
  • If an item or service is denied, call your doctor’s or other health care provider's office to make sure they submitted the correct information. If not, the office may resubmit. If you disagree with any decision made, you can file an appeal.

Download a sample

Part A Medicare Summary Notice [PDF, 78KB]

Part B Medicare Summary Notice [PDF, 78KB]

Publication, product, or other number

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Unofficial name

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