The Medicare Summary Notice (MSN) is used to notify beneficiaries of decisions on claims for Medicare benefits.
Messages are printed on the MSN to explain both general and claims-specific information to beneficiaries.
Contractors responsible for printing MSNs are notified of new or revised MSN messages through Technical Direction Letters or Change Requests.
To view the current (printable) list of MSN messages, see below under "Downloads."
Complete MSN Message List 12-19-22 (XLSX)
MSN Message Character Limits (XLSX)
Sample Part A Medicare Summary Notice (PDF)
Sample Part B Medicare Summary Notice (PDF)
Sample DME Medicare Summary Notice (PDF)
Chapter 21 - Medicare Summary Notices - English Exhibits (ZIP)
Chapter 21 - Medicare Summary Notices - Spanish Exhibits (ZIP)