California’s workers’ comp system has seen one of the biggest procedural changes this past year. In 2026, new Utilization Review (UR) rules have made deadlines tighter, created stricter documentation requirements, and heightened medical necessity requirements. As a result, more treatment requests are being denied than what we saw before.
At Ratto Law Firm, P.C., our California workers’ compensation attorneys are here to help. While more claims are denied, this does not mean you have less rights. It just means you need an attorney in your corner who knows how to fight back against wrongful denials.
What Changed in California’s 2026 UR Rules?
The rule updates changed quite a bit. Now it focuses on much stricter compliance requirements and looks for a faster turnaround. Medical necessity proof requirements have also had a big impact.
Several changes directly affect how treatment requests are reviewed:
1. Shorter Submission and Response Timelines
Treating physicians now have tighter deadlines to submit Requests for Authorization (RFAs), and UR reviewers must issue decisions more quickly. While this was intended to streamline care, it has created more technical denials when paperwork is incomplete or late.
2. Increased Documentation Requirements
UR reviewers now require more detailed clinical justification, including:
- Objective findings
- Clear functional limitations
- Evidence-based treatment rationales
- Updated progress notes
If any of these elements are missing, the request is more likely to be denied.
3. Stricter Enforcement of MTUS Guidelines
California’s Medical Treatment Utilization Schedule (MTUS) has always guided UR decisions, but the 2026 rules require closer adherence. Treatments that fall outside MTUS, even if they are commonly used, face higher scrutiny.
4. Expanded Use of Non-Physician Reviewers
More initial reviews are being conducted by nurses or non-specialist clinicians. If the case is complex or the injury is unusual, these reviewers may deny treatment pending further physician review.
5. Mandatory Electronic Submission Systems
Electronic RFAs are now required in most cases. Providers unfamiliar with the new systems are experiencing upload errors, missing attachments, and formatting issues that lead to automatic denials.
Why More Treatment Requests Are Getting Denied in 2026
The combination of new rules and stricter enforcement has created several predictable patterns.
1. Technical Denials Are Increasing
A “technical denial” happens when the request is rejected for procedural reasons, not medical ones. Common causes include:
- Missing documentation
- Incorrect RFA forms
- Late submissions
- Incomplete clinical notes
- Failure to reference MTUS guidelines
These denials are often preventable but have surged under the new rules.
2. UR Reviewers Are Applying MTUS More Rigidly
Treatments such as chiropractic care beyond the initial guideline limits, extended physical therapy, or certain pain management modalities are being denied unless the provider clearly documents functional improvement.
3. More Requests Are Being Labeled “Not Medically Necessary”
Because reviewers must justify decisions with evidence-based standards, any treatment lacking objective support, like imaging results, measurable deficits, or documented progress, is more likely to be denied.
4. Delays in Provider Compliance
Many physicians are still adjusting to the new electronic systems and documentation requirements. Even small errors can trigger denials.
5. Increased Scrutiny of Long-Term Care
Requests for ongoing treatment are facing tougher review. UR is pushing for measurable improvement before approving additional sessions.
How These Changes Affect Injured Workers
For injured workers, the impact is significant:
- Longer waits for care due to repeated denials and resubmissions
- More pressure on treating physicians to justify treatment
- Higher likelihood of Independent Medical Review (IMR)
- Greater need for detailed medical records
- More disputes between workers, providers, and claims administrators
Workers who previously received routine approvals may now find themselves navigating a more complicated process.
What Injured Workers Can Do When Treatment Is Denied
If your treatment request is denied, you still have options:
- Request a detailed explanation of the denial
- Ask your provider to submit a corrected or expanded RFA
- File for Independent Medical Review (IMR)
- Consult a workers’ compensation attorney
- Document all symptoms, limitations, and changes in condition
Many denials can be overturned with stronger documentation or additional medical support.
Need Help with a Denied Workers’ Compensation Claim, or Want to Avoid a Denial in the First Place?
If you’re ready to fight back against a denial, or avoid one to begin with, we’re here to help. Our team helps you prepare the necessary documentation and seek to prove you are entitled to workers’ compensation benefits.
Our team at Ratto Law Firm, P.C. provides you with the advice and representation you need. Contact us today for a consultation.