Medicare Secondary Payer (MSP) Online Tool
Medicare is the secondary payer when a beneficiary is eligible for coverage under group insurance, Workers' Compensation, or other third-party liability (auto, no-fault, liability) plan. Verify the beneficiary's eligibility in HIPAA Eligibility Transaction System (HETS), myCGS, or the Interactive Voice Response (IVR) system to determine if an open MSP record exists. Use the ANSI ASC X12N 837 format or Direct Data Entry (DDE) to submit MSP claims. Answer the questions below to determine when/how to bill MSP claims to Medicare.
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