Medicare Beneficiary Identifier (MBI) Lookup Inquiry

Available For: Part A, Part B, DME

This tool is an option for providers/suppliers to use if they are not able to obtain the MBI number from the patient.


  • Go to Eligibility from the main menu, then choose the MBI Lookup Inquiry
  • Enter the required Beneficiary Details fields:
    • First Name
    • Last Name
    • Date of Birth (DOB)
    • Social Security Number (SSN)
    • Enter the "I am not a robot" text (Only needed once for every 5 transactions)
Tip The SSN may be different than the HICN if the patient receives benefits under a spouse or family member.


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.


Last Updated Dec 09 , 2023