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July 1, 2011 - Revised: May 22, 2013

Medicare Remit Easy Print (MREP) Remittance Advice Remark Code (RARC) and Claim Adjustment Reason Code (CARC) Update

The Health Insurance Portability and Accountability Act (HIPAA) of 1996 instructs health plans to be able to conduct standard electronic transactions adopted under HIPAA using valid standard codes. Medicare policy states that Claim Adjustment Reason Codes (CARCs) are required in the remittance advice and coordination of benefits transactions. Medicare policy further states that Remittance Advice Remark Codes (RARCs) are required in the remittance advice transaction.

On or after July 5, 2011, all Medicare Remit Easy Print (MREP) users must download the code update file to be used in conjunction with the current updated MREP software. Instructions for downloading and installing the MREP software and/or code update file can be found in the MREP User Guide on the Center for Medicare and Medicaid Services (CMS) website ( Website). In order for the codes to update, the most current version of MREP must be downloaded and installed. If you are already using the most current version of MREP you will only need to download the code update file.

You may also view or print a hard copy of the most current CARC and RARC lists from the Washington Publishing Company website at Website. If you need assistance with downloading the update file, please reach out to the J15 Provider Contact Center at 866.276.9558 then choose Option 2 for EDI.

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