BALTIMORE, Md., Aug. 15, 2012—Medicare is denying an increasing number of claims because providers are not identifying or sending claims to the correct primary payer prior to claims submission. Medicare would like to remind providers, physicians and suppliers that they have the responsibility to bill correctly and to ensure claims are submitted to the appropriate primary payer. Please refer to the “Medicare Secondary Payer (MSP) Manual,” Chapters 1, 3, and 5 and MLN Matters Article SE1217 for additional guidance.