What Is California Labor Code §4610: Utilization Review?

(a) For purposes of this section, "utilization review" means utilization review or utilization management functions that prospectively, retrospectively, or concurrently review and approve, modify, or deny, based in whole or in part on medical necessity to cure and relieve, treatment recommendations by physicians, as defined in Section 3209.3, prior to, retrospectively, or concurrent with the provision of medical treatment services pursuant to Section 4600.

What is Utilization Review under California Labor Code 4610?

UR is the carrier review step for a doctor's request for work injury medical care.

A treating doctor asks for care. The carrier sends the request through Utilization Review, often called UR. The reviewer may approve it. The reviewer may also change it, delay it, or deny it. Labor Code 4610 defines this review process for California work injury care.

UR affects therapy, shots, surgery, tests, drugs, and specialist visits. A timely denial usually goes to Independent Medical Review under California Labor Code 4610.5. Dates matter. So do the papers served with the denial. Eman Yazdchi is a Certified Specialist in workers' compensation law, certified by the California Board of Legal Specialization, State Bar of California.

What kinds of treatment requests go through Labor Code 4610 review?

UR can review future care, past care, or care that is already under way.

The quoted law covers three types of review. Prospective review looks at care before it happens. Retrospective review looks back at care already given. Concurrent review happens while care is in progress. Each type asks the same core question. Is the care needed to cure or relieve the effects of the work injury?

What standard does UR apply?

UR uses medical treatment guides, not the worker's preference or the adjuster's personal view.

UR usually looks to the Medical Treatment Utilization Schedule, also called the MTUS. The denial should name the medical reason and the guide used. A vague denial can still slow care, but the next step depends on timing and service. Keep the doctor's request, the UR decision, proof of service, and appeal papers.

How does a worker challenge a UR denial?

A timely medical denial usually goes to Independent Medical Review.

Independent Medical Review, often called IMR, is the normal appeal path for a timely UR denial. The worker must act within the deadline on the denial form. IMR reviews the records. The treating doctor can help with a short, clear report. The report should list the diagnosis, failed care, exam findings, and why the request fits the guide.

What if the Labor Code 4610 decision is late or defective?

A late or defective UR decision can create a separate procedure dispute.

Timing and service matter. If UR misses a deadline or skips a required step, the worker may argue that the decision is invalid. That is not the same as a normal medical appeal. The worker may need to ask the WCAB for a remedy. Save proof of when the request was sent, received, and served back.