N155 | Service not reimbursable

Industry

Healthcare

Canonical

/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

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.

Related Codes

8 links

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