CMS Pub. 100-06, ch. 3, § 40.1

The term Medicare beneficiary identifier (Mbi) is a general term describing a beneficiary’s Medicare

identification number. For purposes of this manual, Medicare beneficiary identifier references both the

Health Insurance Claim Number (HICN) and the Medicare Beneficiary Identifier (MBI) during the new

Medicare card transition period and after for certain business areas that will continue to use the HICN as

part of their processes.

The FI will demand an overpayment resulting from a claims adjustment if the claims adjustment has had

no recoupment in the past 60 days.

The demand letter must include the following information:

• That an overpayment was made;

• That interest will begin to accrue if the overpayment is not paid in full within 30 days;

• The name and Medicare beneficiary identifier of the beneficiary involved;

• The dates and types of services for which the overpayment was made to include sufficient

information for the provider to identify the overpayment;

• How the overpayment was calculated;

• Why it is liable for recovery of overpayment (i.e., the reasons for finding the provider at fault);

• That recoupment of the overpayment from all available payments is occurring;

• A reference to the Appeals rights in the remittance advice;