Healthcare Error Code
Healthcare Insurance / Medical Billing
Common CMS / Medicare Issues
M15 | Separately billed services
Industry
Healthcare
Canonical
/healthcare/error-codes/m15/
Last Updated
Feb 25, 2026
Summary
This code indicates that services were billed separately when they are typically included in another service.
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What This Code Means
M15 is used when CMS determines that certain services should not be billed separately because they are considered part of another service. This reflects Medicare billing policy rather than coverage eligibility. The code does not imply improper service delivery. It identifies bundling rules applied during claim adjudication.
Where Users Usually See This Code
- Medicare remittance advice
- CMS claim adjustment notices
- EOB statements for Medicare claims
Why This Code Appears
- Services bundled under Medicare rules
- Separate billing not allowed
- Medicare payment policies enforced
What Typically Happens Next
- Payment is reduced or adjusted
- Bundled service remains reimbursed
- Claim processing completes
What This Code Is Not
- It is not a non-covered service
- It is not a documentation error
- It is not patient responsibility
Troubleshooting Checklist
- □ Review Medicare billing guidelines
- □ Confirm bundling rules
- □ Monitor CMS policy updates
Notes And Edge Cases
Bundling rules may change with policy updates. Some services are separately payable under limited circumstances.
Related Codes
8 links
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