Medicare Beneficiary Identifier (MBI)

Use Medicare Beneficiary Identifiers (MBIs) for all Medicare transactions. The Centers for Medicare & Medicaid Services (CMS) replaced the Social Security Number (SSN)-based Health Insurance Claim Numbers (HICNs) with the MBI and mailed new Medicare cards to all Medicare beneficiaries. The cards with MBIs offer better identity protection. With a few exceptions, Medicare will reject claims you submit with Health Insurance Claim Numbers (HICNs). Medicare will reject all eligibility transactions you submit with HICNs.

Medicare Beneficiary Identifier (MBI) Articles

Last Updated: 01/01/2018