The Medicare Summary Notice is a quarterly statement listing the services and supplies billed to Medicare in the beneficiary's name over the preceding three months. Have the notice in front of you along with your Medicare number, the date of service, and the provider name. How Medicare Numbers Get Taken in the First PlaceThe schemes in these cases usually need a valid Medicare number, and the methods for obtaining one are consistent enough to recognize. Treat your Medicare number like a credit card number. Treat any unsolicited call, text or mailer asking for your Medicare number as a red flag regardless of caller ID.