Healthcare Error Code
Healthcare Insurance / Medical Billing
Remittance Advice Remark Codes (RARC)
N155 | Service not reimbursable
Industry
Insurance
Canonical
/insurance/healthcare/error-codes/n155/
Last Updated
Feb 25, 2026
Summary
This code indicates that the service is not eligible for reimbursement under payer rules.
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What This Code Means
N155 is used when a payer determines that a service is not reimbursable. This is a policy-based determination rather than a billing error. It does not imply that the service was inappropriate. Reimbursement eligibility depends on plan and payer guidelines.
Where Users Usually See This Code
- Remittance advice remarks
- EOB denial explanations
- Claim adjudication summaries
Why This Code Appears
- Service excluded from reimbursement
- Policy restrictions apply
- Benefit limitations enforced
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What Typically Happens Next
- Payment is denied
- Claim processing completes
- Responsibility may transfer per policy
What This Code Is Not
- It is not a documentation issue
- It is not a temporary hold
- It is not a duplicate claim
Troubleshooting Checklist
- □ Review reimbursement policies
- □ Confirm coverage exclusions
- □ Monitor plan details
Notes And Edge Cases
Some services may be reimbursable under different plans. Secondary coverage may affect final responsibility.
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Related Codes
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