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 Medicare Secondary Payer FAQs for more information on MSP overpayments and how to determine the MSP overpayment amount. 

Reference

 Code of Federal Regulations, 42 CFR 411.24