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CGS Administrators, LLC

IVR: 866.238.9650 Customer Service and myCGS: 866.270.4909

August 6, 2019

New Medicare Card: Questions about Using the MBI?

Remember: The Medicare Beneficiary Identifier (MBI) uses numbers 0-9 and all uppercase letters except for S, L, O, I, B, and Z. We exclude these letters to avoid confusion when differentiating some letters and numbers (e.g., between "0" and "O"). Read MLN Matters Article New MBI: Get It, Use ItExternal PDF for other helpful information, such as how to get the MBI, and what to do if an MBI changes.

Protect your patients' identities, and use the MBI now. We will reject claims you submit with the Health Insurance Claim Number (HICN), with a few exceptionsExternal Website and reject all eligibility transactions starting January 1, 2020.

Don't have an MBI?

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