Practitioners argue from anecdote about California comp’s two most contested machines — utilization review’s appeal process and the QME panel system. In May the state published the data on both: the DWC’s annual Independent Medical Review report (2025 data), and a DIR-funded RAND study of the entire QME med-legal system built on 1.75 million panel assignments. The numbers settle several arguments.
The IMR organization received 201,037 applications in 2025 and issued 152,351 final determinations, with 91% of unique filings eligible for review and decisions averaging 6–7 days after complete medical records arrived. The headline: reviewers overturned just 10.2% of UR treatment denials — down from 12.7% in 2024. Where flips do happen tells its own story: program services (18.5% overturned), behavioral and mental health services (18.3%), and evaluation-and-management requests (16.8%) run well above the average. Pharmaceuticals remain the biggest single request category at 31% of disputed treatments, with opioids making up 22% of those.
Translation for anyone holding a denial letter: the appeal exists, it is fast, and it usually affirms — which is why the UR/IMR guide’s advice centers on the original request for authorization, not the appeal.
RAND’s study — 1,752,557 panel assignments from 2012 through 2024, covering 5,034 evaluators — maps a system that shrank before it grew. QME offices dropped sharply after the 2013 ten-office cap, supply slid from 2016 to 2020, and the 2021 Medical-Legal Fee Schedule reversed the decline — but the recovery concentrated in metropolitan counties, and some subspecialties, oncology among them, still cannot reliably field a three-name panel. On telehealth, the study found remote evaluations can be appropriate for psychiatric and mental-health exams and recommends keeping the current flexibilities while monitoring quality.
The study’s recommendations, several of which would need legislation: recruit in under-represented specialties and rural areas, add rural and scarce-specialty fee modifiers, relax the ten-office cap for rural offices, let QMEs set a monthly panel maximum, add report-writing time for record-heavy cases, tighten enforcement of QME payment deadlines — and require medical records to be delivered before the evaluation, the everyday failure most evaluators complain about.
The bench data is strategy material: specialty designation on a panel request now comes with a published map of where the bench is thin — see the panel guide. The exam itself and the report that follows are unchanged machinery (the exam · the report), and whatever WPI survives the process still prices the same way — run the string. Figures quoted from the state’s and RAND’s own publications, linked below; descriptive summary, not legal advice.
Plain-language summary for informational use; not legal advice. Figures are quoted from the cited sources.