Workers Compensation Authorization
Overview
Workers' compensation prior authorization varies by state. Most states require pre-approval for non-emergency procedures including surgery, imaging, specialist referrals, and extended treatment. Emergency care and urgent stabilization do not require prior authorization. Approval timelines are 3–5 business days for routine requests and 24–48 hours for expedited requests. Workers' compensation insurers conduct utilization review—evaluating medical necessity against treatment guidelines. Authorization must be obtained before service delivery to ensure claim reimbursement.
Key Requirements
- Most Non-Emergency Procedures Require Authorization: Include surgery, imaging (MRI, CT), specialist referrals, behavioral health, physical therapy, and extended treatment courses. Check with the state WC insurer for your state's requirements.
- Emergency Care Does Not Require Prior Auth: ER visits, urgent care, emergency ambulance transport, and emergency stabilization are covered without pre-approval.
- Submit 5–10 Business Days Before Service: File authorization requests early. Include medical records documenting the work injury and clinical justification for the service.
- Utilization Review Standards: WC insurers apply medical guidelines and evidence standards. Include documentation that the service meets established treatment protocols for the injury type.
Timeline & Process
Contact the workers' compensation insurer to verify authorization requirements before scheduling the procedure. Submit written authorization requests with complete clinical documentation and proof of work-related injury. Routine requests are processed within 3–5 business days. Expedited requests (for urgent situations) are processed within 24–48 hours. Do not deliver non-emergency services until authorization is confirmed in writing. For emergency services, submit authorization request within 24–48 hours of treatment.
Common Denials
| Issue | Solution |
|---|---|
| CO-16 . No Prior Authorization | Resubmit with authorization confirmation or request retroactive approval if medically justified. |
| CO-50 . Not Medically Necessary | Appeal with clinical evidence showing the service meets WC treatment guidelines for the injury. |
| CO-29 . Missing Documentation | Resubmit with complete medical records and physician notes justifying medical necessity. |
Appeal Process
If authorization is denied, file a written appeal with the WC insurer within 30 days. Include additional medical documentation, physician statements, and evidence that the service meets established treatment guidelines. For expedited review of urgent cases, request written confirmation of the expedited process. If the insurer denies the appeal, escalate to the state workers' compensation board. The board will schedule a hearing and review both the insurer's determination and your clinical evidence.
Common Questions
Do all workers' comp services require prior authorization?
No. Most states require prior authorization for non-emergency procedures and specialist referrals. Emergency care, urgent treatment, and initial evaluation typically do not require pre-approval.
How long does workers' comp authorization take?
Routine authorizations: 3–5 business days. Expedited requests: 24–48 hours. Timelines vary by state and insurer. Submit early to avoid service delays.
What happens if I treat without authorization?
Treatment without prior authorization may result in claim denial. Some states allow reimbursement if medical necessity can be established afterward. Always obtain authorization when required.
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This reference is for informational purposes. Payer policies change frequently. Always verify against your state workers' compensation commission documentation. Last updated: 2026-03-16.