If you get a Medicare-covered service, like a lab test or doctor’s visit, you will get a Medicare Summary Notice (MSN) in the mail. The MSN shows all the services or supplies that were billed to Medicare during each 3-month period, what Medicare paid, and what you may owe the provider. The MSN isn’t a bill. When you get your MSN, you should do the following:
- If you have other insurance, check to see if your other insurance 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 pay a bill before you get your MSN, compare your MSN with the bill to make sure you paid the right amount for your services.

