Skip to main content
Corporate
CGS Administrators, LLC

Serving the states of MN, WI, IL, IN, OH, KY and MI

Medicare Beneficiary Identifier (MBI)

Every person with Medicare has been assigned a Medicare Beneficiary Identifier (MBI) and issued a new Medicare card. The MBI is confidential and should be protected as Personally Identifiable Information.

Transition Period Ends December 31, 2019:

Claims, reopening requests, prior authorization requests, and eligibility transactions may be submitted with either an MBI or HICN during the transition period. The transition period ends on December 31, 2019. All claims with HICNS must be received by December 31, 2019.

Do not wait until January 1, 2020, to start using MBIs! Use the transition period as a live test to make sure you are ready to use MBIs for ALL of your Medicare transactions.

January 1, 2020: The MBI will be required for all transactions submitted to Medicare including (not all inclusive)

CGS encourages suppliers to use the MBI for all workloads. However, there are a few exceptions when you can use either the HICN after January 1, 2020, if you are unable to obtain the MBI:

How to Obtain the MBI:

Is Your Vendor/Clearinghouse Submitting Your Claims with the MBI?

If you send the Medicare Beneficiary Identifier (MBI) to your vendor/clearinghouse on your Medicare claim for payment, but you see both the Health Insurance Claim Number (HICN) and the MBI on your remittance advice, your vendor/clearinghouse is not using the MBI to submit your claims. Contact your vendor/clearinghouse today and ask about their process to submit Medicare claims. Make sure your vendor/clearinghouse is submitting your claims with the MBI, or they will be rejected.

Claim Submission when the MBI Changes:

The MBI may be changed due to a beneficiary or authorized representative request, or CMS may initiate the change. Refer to "What to Do If the MBI Changes."

Using the old or new MBIs in relation to claim submissions:

There are a few exceptions when you can use either the HICN or MBI on or after January 1, 2020:

CGS Resources:

myCGS MBI Lookup Tool

Use myCGS to look up any Medicare beneficiary's MBI, regardless of where they live. To find MBIs in the portal, your Medicare beneficiaries must provide their first and last name, date of birth an SSN.

DME Medicare Beneficiary Identifier (MBI) Converter for the IVR

The Interactive Voice Response (IVR) system requires you enter your patient's name and Medicare number during the beneficiary validation process. Use this tool to convert the patient's MBI to the corresponding numbers on your telephone key pad.

DME MAC Webinars

What to Do If the MBI Changes

MBI FAQs

CMS Resources

CMS New Medicare CardsExternal Website

New Medicare Beneficiary Identifier (MBI) Get It, Use ItExternal PDF [MLN Matters SE18006]

Last updated: 12.31.19

Two Vantage Way, Nashville, TN 37228 © CGS Administrators, LLC. All Rights Reserved