Claims submitted without MBIs will be rejected, with some exceptions. The MBI replaces the social security number-based Health Insurance Claim Numbers (HICNs) from Medicare cards and is now used for Medicare transactions like billing, eligibility status and claim status.
- Ask your patients for their card. If they did not get a new card, give them the Get Your New Medicare Card flyer in English or Spanish.
- Use your Medicare Administrative Contractor’s look-up tool. Sign up for the Portal to use the tool.
- Check the remittance advice. Medicare returns the MBI on the remittance advice for every claim with a valid and active HICN.
For more information, see the MLN Matters article.