New Medicare Cards MBI Look-Up Tool Available Through Your MAC

As of this week, all Medicare Administrative Contractors (MAC) secure portals Medicare Beneficiary Identifier (MBI) look-up tools are available for use. This tool is used to look up MBIs for Medicare patients when they have lost or do not have their Medicare card. To access the tool, you will need to sign up for your MAC’s portal. If you need additional assistance please contact Jillian Winans, regulatory affairs specialist, at or 703-591-2220.