Please Note: There is no Medicare information on our corporate website. Please select a specific contract in the 'Search Within' box for Medicare related information.
© 2021 Palmetto GBA, LLC
We frequently update our articles to reflect the latest changes and updates to Medicare, and strongly recommend you visit this article at link below to confirm you have the latest version.
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)
We value your opinion and want to provide the highest-quality and most relevant Medicare knowledge possible. Please let us know if this article was helpful.
It didn't answer my question
This article was helpful
We’re glad we could help you today and appreciate your feedback. When you rate our articles as most helpful, we know that we are on the right track for providing you with important news and information.
We're sorry this article didn't help you today. We'll use your feedback to review this article to try to revise or expand it. Contact us with more feedback or a question on this topic.
Last Updated: 03/17/2020
We've recently uppgraded our website and it looks you're trying to access an old link. Please select an option below.
Attempt to load this page on new site
Go to Home page
Go to Contact Us page
View a related article: