The short answer
A Medicare Summary Notice is not a bill. For Original Medicare, it explains claims, what Medicare paid, and the maximum amount you may owe.
A useful next step
Match it to your records
Compare the service dates and items with your own receipts and bills.
Ask about differences
If something looks wrong, ask the provider’s billing office to explain the submitted information.
Look for appeal instructions
If you disagree with a coverage decision, use the instructions and deadline on the notice. Ask for help promptly.
Words you can use
“Can you explain this line on my notice and how it relates to the bill I received?”
An everyday example · Fictional
Alex receives a provider bill and a Medicare Summary Notice. Alex compares the dates before calling the billing office about a difference.
A question worth keeping
Ask whether this document is a bill, a claim notice, or a coverage-change notice.
Words on this page
- Medicare Summary Notice (MSN)
- The notice Original Medicare mails every three months listing claims, what Medicare paid and what you may owe. It is not a bill. Medicare Summary Noticemedicare.gov
Source and scope
General educational guidance. This does not confirm benefits, eligibility, deadlines, or costs for an individual.
Official sources
Links open the official site in this tab. We send no information about you. Checked October 10, 2026.