We removed Social Security Numbers from Medicare cards and replaced them with Medicare Beneficiary

We're using Medicare Beneficiary Identifiers (MBIs).

Get details to help you with MBIs

• For health care providers & office managers

• For health & drug plans

• For partners & employers

• For states

Get quick resources to help you use MBIs

• Resources about the MBI

• Frequently asked questions (PDF)

“Safeguarding our beneficiaries' personal information continues to be one of our top priorities."