Medicare Secondary Payer (MSP) overpayments are processed differently than non-MSP overpayments and require a refund to be sent within sixty days of receiving a duplicate payment. Complete the appropriate Medicare Secondary Payer return of monies voluntary refund form (see below) and attach a check for the overpaid amount. In addition, the other insurer’s explanation of benefits and/or payment information is required for every claim involved.

• Return of Monies Voluntary Refund Form

Refer to the Billing/Coding FAQs for more information on MSP overpayments and how to determine the MSP overpayment amount. 

Reference

•  Code of Federal Regulations, 42 CFR 411.24