CARC P4 Active

OA-P4: Workers' Compensation Claim Non-Compensable

TL;DR

The workers' compensation claim was determined non-compensable — the injury does not qualify for WC benefits. Appeal through the state WC dispute process if you believe the claim should be compensable, or redirect to the patient's health insurance.

Action
Verify & Resubmit
Who Pays
Depends
Appeal
Yes
Patient Impact
Indirect
Disclaimer
This content is for informational purposes only and does not constitute professional billing advice. Always verify information against your payer contracts and current coding guidelines. Consult a certified billing specialist for specific claim issues.

What Does OA-P4 Mean?

CARC P4 indicates the workers' compensation carrier adjudicated the claim as non-compensable, meaning the injury or illness does not qualify for WC benefits under applicable state law. This is different from P2 (not work-related) — P4 specifically means the WC carrier reviewed and determined the claim does not meet the criteria for compensability under the state's WC statute.

Reasons for non-compensability include the employer disputing the claim, the treatment not being causally related to the accepted work injury, the WC benefits not being available for this type of treatment under state law, or the claim failing to meet procedural requirements for compensability.

The appeal path is through the state workers' compensation dispute resolution process, not through the standard insurance appeal process. If the claim is legitimately non-compensable, redirect it to the patient's health insurance.

Common Causes

Cause Frequency
Non-compensability determination during review The WC carrier's utilization review determined the treatment is not compensable Common

How to Resolve

Appeal through the WC dispute process if the claim should be compensable, or redirect to health insurance.

  1. Review the non-compensability determination Understand why the WC carrier determined the claim is non-compensable.
  2. Gather supporting documentation Compile the incident report, First Report of Injury, physician causation opinion, and relevant medical records.
  3. Appeal through state WC process File a formal dispute through the state WC dispute resolution process with evidence supporting compensability.
  4. Redirect to health insurance if non-compensable If the claim is genuinely non-compensable, redirect to the patient's health insurance plan.
  5. Update billing records Update the patient's insurance and WC claim information to reflect the determination.
Appeal Guide

Appeal with documentation establishing compensability of the WC claim.

How to Prevent OA-P4

Also Filed As

The same CARC P4 may appear with different Group Codes:

CO-P4 PR-P4

Related Denial Codes

OA-19 — Workers' Compensation Claim OA-20 — Liability Carrier Responsible OA-21 — No-Fault Carrier Responsible OA-22 — Coordination of Benefits - Another Payer May Cover OA-23 — Prior Payer Adjudication Impact

Sources

  1. https://x12.org/codes/claim-adjustment-reason-codes
  2. https://www.cms.gov/medicare/coordination-benefits
  3. Codes maintained by X12. Visit x12.org for official definitions.