Feb Industry Notes: Medicare Updated MBIs/Member IDs Causing Rejections 

According to a CMS press release, a security vulnerability in the MOVEit software used by Wisconsin Physicians Service Insurance Corporation (WPS) led to unauthorized access of personal information for 946,801 Medicare beneficiaries. This breach, occurring between May 27 and May 31, 2023, has prompted CMS to take swift action to protect affected individuals.  

Compromised data includes sensitive information such as names, Social Security numbers, and Medicare Beneficiary Identifiers (MBIs). In response, CMS is issuing new Medicare cards with new MBI numbers to all affected beneficiaries.  

WPS is the Medicare Administrative Contractor (MAC) for these States: Iowa, Kansas, Missouri, Nebraska, Indiana, and Michigan. 

You may see Real Time Eligibility (RTE) responses for these members denying for “Subscriber Not Found” even though the IDs matched the cards in scans. 

If you get this response, ask the patient for their new card. If they don’t have it, obtain their Social Security Number (SSN) using the Medicare Beneficiary Identifier (MBI) Lookup tool at https://www.wpsgha.com/guides-resources/view/759.  

Once updating the member ID, the RTE shows active for DOS with no issues. 

 It’s important to run RTE for all Medicare beneficiaries to prevent delays in payment.