Medicare Beneficiary Identifier (MBI) Look Up Tool

This tool is an option for providers/suppliers to use if they are not able to obtain the MBI number from the patient. The new cards are being mailed in phases following a geographic location strategy.


  • Choose TIN/SSN, NPI, PTAN and Program under Provider/Supplier Details
  • Enter First Name, Last Name, Date of Birth (DOB) and the patient's Social Security Number (Note: The patients SSN may be different than their HICN. Example: A wife receiving Medicare benefits under their spouse.)
  • Enter the "I am not a robot" text (Only needed once for every 5 transactions)

This image shows the MBI Lookup Inquiry screen in the Noridian Medicare Portal.


The MBI number will display under the MBI Lookup Details along with the beneficiary information entered for the inquiry.

  • If the patient information is not accurate, a message indicating the MBI details could not be located will be displayed.

This image shows the MBI Lookup Response screen in the Noridian Medicare Portal.

Last Updated Mar 22, 2019