Medicare - MBI Number Look Up

• MBI number is the new identification number provided to Medicare beneficiaries.

• It is a replacement for HICN (Health Insurance Claim Number).

• MBI has 11 characters in an alpha-numeric format which has the same length as HICN but does not include SSN.

• The MBI number does not include the letters S, L, O, I, B, and Z.

• Medicare started to provide new cards to its members from April 2018. 

• Effective January 1, 2020, it is necessary to bill the claim with the MBI number. Medicare will reject the claim if the claim is billed with HICN.

• MBI numbers can be obtained through the Medicare web portal using the "MBI Look Up" tool.

• When searching for an MBI number, it is necessary to have the patient's last name, patient's first name, DOB, and SSN, or else an MBI number cannot be obtained.

• If anyone information is missing then the MBI number cannot be obtained and will need to contact the patient.