Do you have a claim rejecting due to an incorrect MBI? Then you need to do a little research. “If you get an eligibility transaction error code (AAA 72) of ‘invalid member ID,’ or ‘The beneficiary you requested cannot be found. Please verify your information,’ your patient’s MBI may have changed” since it was originally issued, the Centers for Medicare & Medicaid Services explains in a new article. “Remember, requests to change MBIs can occur if a Medicare beneficiary, their authorized representative, or CMS suspects a number is compromised.” Patients may give you the old card, or seek care before receiving a new one. Tip: When you get such an error code, “do a historic eligibility search to get the termination date of the old MBI,” CMS advises. Then, “get the new MBI from your Medicare Administrative Contractor’s secure lookup tool.”