Healthcare Error Code
Healthcare Insurance / Medical Billing
Common CMS / Medicare Issues
M279 | Claim rejected
Industry
Healthcare
Canonical
/insurance/healthcare/error-codes/m279/
Last Updated
Feb 25, 2026
Summary
This code indicates that the claim was rejected during processing.
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What This Code Means
M279 is applied when CMS rejects a claim due to administrative or policy reasons. Rejection occurs before full adjudication. The code does not specify the reason by itself. Additional messages usually explain the rejection cause.
Where Users Usually See This Code
- Medicare remittance advice
- Claim rejection notices
- Submission status reports
Why This Code Appears
- Submission errors detected
- Policy or eligibility checks failed
- Required data missing
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What Typically Happens Next
- Claim processing stops
- Reprocessing may be required
- Payment is not issued
What This Code Is Not
- It is not a specific denial reason
- It is not patient responsibility
- It is not a contractual adjustment
Troubleshooting Checklist
- □ Review rejection details
- □ Confirm submission requirements
- □ Monitor resubmission timelines
Notes And Edge Cases
Rejected claims differ from denied claims. Rejection often allows correction and resubmission.
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Related Codes
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