OA-19: Workers' Compensation Claim

What Does OA-19 Mean?

OA-19 appears less frequently and is typically used when the payer flags the claim as potentially work-related but the financial responsibility is not yet clearly assigned. This can occur in coordination of benefits situations where the workers' comp carrier's liability is disputed or when the payer needs additional information before determining the correct financial disposition. The OA designation means neither the provider's contract nor the patient's responsibility has been definitively triggered.

When CARC 19 appears on a remittance, the health insurer is telling you that the injury or illness billed on this claim falls under the jurisdiction of a workers' compensation carrier. The health plan is declining payment because workplace injuries are excluded from standard health insurance coverage when workers' comp coverage exists. The claim needs to be rerouted to the correct payer — the workers' compensation carrier responsible for the patient's workplace injury.

This denial typically surfaces when the payer's system detects indicators of a work-related injury based on the diagnosis codes, injury date and time, or other claim data. The most common scenario is straightforward: the provider inadvertently billed the patient's regular health insurance for a workplace injury instead of the workers' comp carrier. This often happens because the patient did not disclose the work-related nature of the injury at intake, or because registration staff did not ask the right questions about injury circumstances.

The financial impact depends on how quickly you can redirect the claim. Workers' compensation carriers have their own filing deadlines, documentation requirements, and fee schedules that differ from standard health insurance. Delays in identifying the correct carrier can push the claim past the workers' comp timely filing limit, leaving the provider with no payer to bill. If the injury is genuinely not work-related and the health insurer classified it incorrectly, a well-documented appeal can overturn the denial.

How to Resolve

Determine if the injury is work-related, then either submit the claim to the workers' comp carrier or dispute the classification with the health insurer.

1. Review the ERA for additional context Check for accompanying RARCs that explain why OA was used. Determine if the payer needs more information to assign financial responsibility or if coordination of benefits is involved.
2. Investigate and determine correct payer Contact the patient and their employer to clarify whether the injury is work-related. If it is, identify the workers' comp carrier and submit. If not, provide the health insurer with documentation supporting non-work-related status.
3. Submit to the correct carrier with full documentation Direct the claim to whichever carrier is responsible based on your investigation, attaching all supporting documentation.

How to Prevent OA-19

• Collect complete information about the injury circumstances and all potentially responsible payers during patient intake
• Verify coordination of benefits order before initial claim submission for any injury-related visit
• Document injury details thoroughly in the medical record to support proper payer determination

Also Filed As

The same CARC 19 may appear with different Group Codes:

Related Denial Codes