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Printed Date: 9/22/2015
Requests to change a Medicare Beneficiary Identifier (MBI) can occur if a Medicare beneficiary, their authorized representative, or CMS suspects a number is compromised. If CMS reissues MBIs, it is possible your patients will seek care before receiving a new card with their new MBI.
Your patient’s MBI may have changed if you receive an eligibility transaction error code (AAA 72) of “invalid member ID,” or the eServices Eligibility Inquiry message, “The beneficiary you requested cannot be found. Please verify your information.”
When an MBI changes, the beneficiary is advised to share the new MBI with their providers. If you cannot obtain the new MBI from the patient, you can get it from the eServices MBI Lookup Tool. Sign up for eServices now to use the tool. Instructions for using the MBI Lookup Tool can be found on the Palmetto GBA website. The Provider Contact Center cannot disclose the new MBI.
The following scenarios can help you determine when to use the old or new MBIs:
Fee-For-Service (FFS) claims submissions with:
FFS eligibility transactions when the:
You can find the termination date of the old MBI by doing a historic eligibility search in eServices. The termination date will be returned in the MBI End Date field of the Eligibility tab.
Resource: MLN Matters article SE18006 New Medicare Beneficiary Identifier (MBI) Get It, Use It. (PDF, 210 KB)
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Last Updated: 02/06/2020