myCGS

myCGS User Manual

MBI Look-Up

What Is the Medicare Beneficiary Identifier?

As a result of the Medicare Access and CHIP Reauthorization Act of 2015 (MACRA), the social security number-based Health Insurance Claim Number (HICN) was removed from the Medicare card and replaced with the new Medicare Beneficiary Identifier (MBI). All Medicare beneficiaries were mailed new Medicare cards identifying their newly assigned, system-generated MBIs.

Beginning January 1, 2020, the MBI is used in all Medicare transactions in place of the HICN.

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Using the MBI Look-Up Tool

If you need to obtain a patient's MBI:

  • Once logged into myCGS, click on the MBI Look-up tab.
  • Complete the required fields:
    • Patient's first name
    • Patient's last name
    • Patient's social security number
    • Patient's date of birth
  • To meet our reCAPTCHA requirements, you may have to select the "I'm not a robot" box.

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    • NOTE: A reCAPTCHA image may display requiring you to select specific squares of the image.

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  • Click "Submit."
  • If the information entered can be verified, myCGS will display the patient's MBI in the lower-left corner of the page.

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  • To search for a new MBI, either click the "Clear" button and enter new identifying information or enter the new information and click the "Submit Inquiry"button.
  • If the social security number entered is not correct or the patient's name does not match our files, an error message will display.

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