OA-P4: Workers' Compensation Claim Non-Compensable

What Does OA-P4 Mean?

OA-P4 indicates the non-compensability determination with a directive to redirect the claim. This appears when the carrier is signaling that another payer should evaluate the charges rather than treating the denial as a straight contractual write-off.

CARC P4 indicates that the workers' compensation carrier has formally determined the claim is non-compensable under the jurisdiction's regulations. Unlike P2, which focuses on whether the injury is work-related, P4 reflects a broader adjudication — the entire claim has been reviewed and the carrier has been found not liable. This code replaces the older CARC 214 and is exclusive to workers' compensation claims.

The compensability determination behind P4 typically involves a formal process. The carrier may have filed a Notice of Controversy disputing liability, and the claim may have gone through an administrative hearing where the WC board ruled the carrier is not liable. Reasons for non-compensability can include the injury not meeting jurisdictional definitions of a workplace injury, the statute of limitations having expired, the employee not performing work duties at the time of injury, or the employer contesting the claim.

From a billing perspective, CO-P4 means the denied amount is a contractual write-off that cannot be billed to the patient. The provider's options are to dispute the compensability finding through the jurisdiction's WC administrative process or redirect the claim to the patient's alternate insurance. Because the compensability determination is often the result of a formal adjudication, a successful dispute typically requires new evidence or a procedural challenge to the original ruling.

How to Resolve

Review the compensability adjudication, challenge through the WC administrative process if appropriate, or redirect the claim to alternate coverage.

1. Identify the correct payer Review the patient's coverage to determine which insurer should receive the redirected claim — group health, auto insurance, or other applicable coverage.
2. Resubmit the claim File the claim with the identified payer using the correct billing format and payer-specific requirements.
3. Track the redirected claim Follow up with the new payer to ensure the claim is processed and payment is received.

How to Prevent OA-P4

• Always collect all insurance coverage details at patient registration for WC cases
• Establish billing workflows for automatic claim redirection when WC denials are received

Also Filed As

The same CARC P4 may appear with different Group Codes:

Related Denial Codes