OA-P16: Provider Not Authorized to Treat Injured Workers
The authorization issue is pending review. Expedite your certification process and provide any requested documentation.
What Does OA-P16 Mean?
OA-P16 appears when the authorization issue is pending resolution or when an emergency exception is being reviewed by the carrier. This is an interim adjustment while the authorization status is being determined.
CARC P16 is applied when the workers' compensation carrier denies payment because the treating provider is not authorized or certified to provide treatment to injured workers in the applicable jurisdiction. Many states require providers to register with the state workers' compensation authority, obtain a specific WC provider certification, or meet credentialing requirements before they can treat injured workers and bill WC carriers.
The authorization requirements vary significantly by jurisdiction. Some states require providers to register with the state WC board and obtain a provider number. Others restrict which provider types can serve as the primary treating physician — for example, some states require the treating physician to be an MD or DO and do not allow chiropractors or nurse practitioners to fill that role. Multi-state practices face particular challenges because authorization requirements differ across jurisdictions.
P16 is a credentialing issue, not a clinical denial. The carrier is not saying the treatment was unnecessary or inappropriate — it is saying the provider is not authorized to bill for WC services in that jurisdiction. The fix is to resolve the credentialing gap: obtain the required authorization, then request claim reprocessing. For emergency situations where an unauthorized provider rendered necessary emergency care, most jurisdictions have exception provisions that allow payment despite the authorization gap.
Common Causes
| Cause | Frequency |
|---|---|
| Provider authorization status pending The provider's WC authorization application is in process but has not been finalized by the jurisdiction, and the carrier cannot pay until authorization is confirmed | Most Common |
| Emergency services by unauthorized provider under review An unauthorized provider rendered emergency services to an injured worker, and the carrier is reviewing whether the emergency exception applies under jurisdictional rules | Common |
How to Resolve
Resolve the provider authorization/certification gap and request claim reprocessing, or submit emergency exception documentation if applicable.
- Expedite the authorization application If your authorization is pending, contact the state WC board to check on the application status and expedite if possible.
- Provide emergency documentation If emergency services were rendered, submit all documentation supporting the emergency exception to the carrier.
- Follow up on claim status Track the claim and follow up with the carrier regularly until the authorization status is resolved and the claim is reprocessed.
This adjustment is typically correct as processed. Review the specific circumstances before taking further action.
How to Prevent OA-P16
- Complete WC provider registration before accepting any WC patients in a new jurisdiction
- Establish emergency care protocols for documenting the urgent nature of services when treating unscheduled WC patients
General Prevention
- Complete WC provider registration before accepting WC patients in a new jurisdiction
- Establish emergency care protocols that document the urgent nature of services when treating unscheduled WC patients
Also Filed As
The same CARC P16 may appear with different Group Codes:
Related Denial Codes
Sources
- https://www.mdclarity.com/denial-code/p16
- https://x12.org/codes/claim-adjustment-reason-codes
- Codes maintained by X12. Visit x12.org for official definitions.