New Medicare Card: Questions about Using the MBI?

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 It (PDF, 213 KB) for other helpful information, such as how to get the MBI, and what to do if an MBI changes.

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

Don’t have an MBI?

  • Ask your patients for their cards. If they did not get a new card, give them the “Get Your New Medicare Card” flyer in English (PDF, 563 KB) or Spanish (PDF, 575 KB).
  • Use your Medicare Administrative Contractor’s lookup tool. Sign up (PDF, 103 KB) for the portal to use the tool.
  • Check the remittance advice. We return the MBI on the remittance advice for every claim with a valid and active HICN.

Contact Palmetto GBA JM Part B Medicare

Email Part B

Contact a specific JM Part B department

Provider Contact Center: 855-696-0705

TDD: 866-830-3188

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