03/30/2026
Medicare is sending new cards to about 1.3 million people to help protect against identity theft. If you are one of these people, you will receive a new card in the mail with a new Medicare Beneficiary Identifier (MBI), which is the ID number on your Medicare card. New cards will be active starting April 14, 2026.
What you should do:
• Keep the new card if one arrives. Do not throw it away.
• Watch out for scams. When new Medicare cards have been mailed out in the past, some people received fraudulent calls asking them to provide their new ID number. As a general rule, never give your Medicare ID number to anyone you do not know.