CMS New Medicare Beneficiary Identifier (MBI)

April 4, 2018: Attention ALL Providers: The Centers for Medicare & Medicaid Services (CMS) will remove Social Security Numbers (SSNs) from all Medicare cards by April 2019. A new unique Medicare Beneficiary Identifier (MBI) will replace the current Health Insurance Claim Number (HICN) on the new Medicare cards. CMS will begin mailing new cards to people in April 2018.

Providers systems and business processes must be ready to accept the new MBI number by April 2018 for transactions, such as billing, claim status, eligibility status, and interactions, with the CMS Medicare Administrative Contractor (MAC) contact centers.

There will be a transition period when providers can use either the HICN or the MBI to exchange data and information with CMS. The transition period will start April 1, 2018, and run through December 31, 2019. However, providers systems must be ready to accept the new MBI by April 1, 2018.

Providers should refer to the CMS Fact Sheet to ensure they are prepared to receive the MBI:
Learn more about the CMS New Medicare Card Project: