If you're dealing with a workers’ compensation claim in California, you’ve probably already run into one of the most frustrating parts of the process: Utilization Review (UR).
This is where an insurance company reviews your doctor’s treatment request, and decides whether it’s “medically necessary.”
As of April 1, 2026, new changes to California’s Utilization Review system are already impacting injured workers across the state. While the goal is to speed things up, many workers are now seeing more denials and stricter requirements.
Here’s what changed and what you need to do to protect your claim.
What Is Utilization Review (UR) in California Workers’ Comp?
Utilization Review (UR) is the process used by insurance companies to evaluate whether your doctor’s recommended treatment will be approved.
This can include:
- Surgery
- Physical therapy
- Medications
- Diagnostic tests
The decision is based on medical guidelines like the Medical Treatment Utilization Schedule (MTUS), not just your doctor’s opinion.
What Changed in April 2026?
The new updates from the Division of Workers’ Compensation (DWC) focus on stricter documentation and faster decision timelines.
Here’s what that means in practice:
- Treatment requests must now strictly follow MTUS guidelines
- Missing or unclear documentation can trigger automatic denials
- Insurance companies are now required to respond faster than before
- Less back-and-forth but also less margin for error
👉 In short: if the request isn’t perfect the first time, it’s more likely to get denied.
Why More Treatment Requests Are Being Denied
Under the new rules, approvals depend heavily on how well your doctor documents your condition.
Common reasons for UR denials now include:
- Lack of detailed medical evidence
- Failure to reference MTUS guidelines
- Incomplete reports or missing records
- Requests that appear “vague” or unsupported
⚠️ Important: A denial doesn’t always mean you don’t need the treatment, it often means something was missing in the paperwork.
What Should You Do After a UR Denial in California?
If your treatment gets denied, don’t panic, but don’t wait either.
Here’s what to do immediately:
- Read the denial letter carefully → Look for the exact reason
- Check for missing documentation → This is often the issue
- Talk to your doctor right away → Ask if they can revise the request
- Act fast → Deadlines are stricter under the new system
How to Request an Independent Medical Review (IMR)
If your treatment is denied through UR, you have the right to request an Independent Medical Review (IMR).
This is a separate process where an independent doctor reviews your case.
Key things to know:
- You must file your IMR request within a limited time window
- The review is based on medical records and MTUS guidelines
- Missing deadlines can mean losing your right to challenge the denial
👉 Timing is everything here.
How to Avoid Delays in Your Workers’ Comp Claim
With the new UR system moving faster, you need to be more proactive than ever.
Here’s how to stay ahead:
- Communicate with your doctor. Make sure they understand the latest documentation requirements
- Stay organized. Keep copies of all reports, requests, and responses
- Review everything carefully. Small errors can now lead to big delays
- Get guidance early. The sooner you act, the more options you have
The Bottom Line
California’s Utilization Review system is becoming faster, but also more rigid.
While these changes are meant to reduce delays, they’re also leading to:
- More technical denials
- Less flexibility
- Higher pressure on documentation
Right now, the best strategy is simple: Don’t assume anything, verify everything.
A missing detail or a small mistake in paperwork can be the difference between getting the treatment you need or waiting even longer.
Need Help After a UR Denial?
If your treatment has been denied or you’re stuck in the Utilization Review process, you don’t have to figure this out alone, at Pacific Workers, we help injured workers understand their rights, fight delays, and take the next step after a denial.
📞 Visit www.pacificworkers.com or call us today at 800-606-6999 for a free consultation and get clear answers about your case.
The sooner you act, the better your chances of getting the care you deserve.