Pub 100-05 Medicare Secondary Payer: Instructions on utilizing 837 Institutional CAS segments for Medicare Secondary Payer (MSP) Part A Claims
Guidance that alerts the Medicare contractors and shared systems to the changes necessary to derive Medicare Secondary Payer (MSP) payment calculations from incoming 837 4010-A1 claims transactions. It also announces that Transmittal 66, dated March 27, 2009, is rescinded and replaced with this guidance (Transmittal 70). The implementation date for the FISS shared system and its users is changed from July 6, 2009, to October 5, 2009, and all other information remains the same.
Issued by: Centers for Medicare & Medicaid Services (CMS)
Issue Date: June 26, 2009
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