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Tips to prevent claim adjustment reason code (CARC) CO 97

December 23, 2025
There are a few scenarios that exist for denial reason code CO 97, as outlined below. Please review the associated remittance advice remark code (RARC) noted on the remittance advice for your claim and then refer to the specific resources a…

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.

Use of JW and JZ Modifiers when Billing for Separately Payable Incident-to Supplies

January 30, 2026
Effective January 1, 2026, the application of the JW and JZ modifiers has changed for certain skin substitutes per the calendar year (CY) 2026 final rule. This article describes the changes.

Method II critical access hospital: Professional billing requirements for emergency department services

January 30, 2026
New section, Emergency department procedure codes for Method II CAH, added to the Medicare Claims Processing Manual Pub.100-04, chapter 4, section 250.18.

Incarcerated beneficiary

February 6, 2026
View these guidelines for a beneficiary who is incarcerated or in custody at the time items and services are furnished.

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 reject reason code 34538

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

Steps to prevent reject reason code 36428

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

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.
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