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Update to CARC and RARC codes for use with MREP 4.6

February 25, 2026
An updated remittance advice remark code (RARC) and claim adjustment reason code (CARC) “Codes.ini” file is now available for download.

Avoiding hospice claim rejects

January 27, 2026
Providers billing Medicare should determine if a patient is enrolled in hospice before billing Medicare Part A. This article has tips on checking patient eligibility and avoiding hospice claim rejects.

Returned or rejected as unprocessable claims affect timely filing

February 16, 2026
A claim must be submitted to Medicare no later than one year after the date of service to be considered filed timely. Claims returned or rejected as unprocessable have not been filed successfully.

Avoid negative impacts to your claims -- review LCD L39073 and billing and coding article A58812 pharmacogenomics testing

March 6, 2026
Important information you must know if you bill for pharmacogenomics testing.

Tips to prevent claim adjustment reason code (CARC) CO 22

March 17, 2026
CARC 22 - This care may be covered by another payer per coordination of benefits. This denial was received because Medicare records indicate that Medicare is the secondary payer.

Tips to prevent reject reason code C7010

March 10, 2026
Read this article for tips on how to prevent reject reason code C7010.

Tips to prevent claim adjustment reason code (CARC) PR 49

March 17, 2026
Read this article for tips on how to prevent claim adjustment reason code (CARC) PR 49.

Steps to prevent reject reason code 36428

February 24, 2026
Steps to prevent rejection when submitting a claim for mammography screening services.

Tips to prevent reject reason code 34538

February 24, 2026
Read this article for tips on how to prevent reject reason code 34538.

Resolving claims overlapping a skilled nursing facility (SNF) stay

April 13, 2026
Is your facility receiving denials for a claim overlapping a skilled nursing facility (SNF) stay? Claims overlapping with a skilled nursing facility (SNF) stay can occur for several reasons. This article is intended to assist providers with…
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