The purpose of this memorandum is to announce that CMS released the secure web-based Medicare Beneficiary Identifier (MBI) Plan lookup tool in the Medicare Advantage Prescription Drug System (MARx) on the M232 beneficiary eligibility screen. The MBI Plan lookup tool provides authorized users the ability to obtain an individual beneficiary’s MBI using specified search criteria.
May 19, 2020 – MBI Plan Lookup Tool
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MBI Plan Lookup Tool
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Please see the memorandum (MBI Lookup Tool) from Jerry Mulcahy, Director, Medicare Enrollment Appeals Group in the Downloads section below.