What Is a QME in California Workers' Compensation?

How does the California QME process actually work?

A panel of three QMEs is issued by the state Medical Unit; each side strikes one, and the remaining physician conducts the medical-legal evaluation.

The QME process is procedural and unforgiving on deadlines. A missed objection or a botched panel strike can lock a worker into a damaging report. The mechanics below describe how the process runs from the medical dispute to the final report.

What triggers a QME in the first place?

A QME is requested when there is a medical dispute between the worker and the insurance company, most often about causation (was the injury work-related?), permanent disability rating (how impaired is the worker?), apportionment (how much of the disability is industrial?), or future medical care needs under California Labor Code §4600. Either side can request a QME panel by filing the appropriate form with the California Division of Workers' Compensation Medical Unit, and the panel is issued in the specialty the requesting side identified.

How is the QME panel selected?

For an unrepresented worker, the Division of Workers' Compensation issues a panel of three QMEs in the requested specialty, drawn from QMEs whose offices are within a reasonable geographic radius. The worker has 10 days to strike one name; the insurer has 10 days to strike one of the remaining two. The last QME standing is the evaluator. For a represented worker, the panel-strike procedure under California Labor Code §4062.2 applies, each party strikes one name, and the unstruck physician is the QME. Represented cases often resolve through an AME (Agreed Medical Evaluator) instead, where both sides jointly select one physician.

Why does specialty selection matter so much?

The same lumbar disc herniation can rate 15% permanent disability with an orthopedic surgeon and 28% with a pain medicine physician. The same psychiatric injury can rate one way with a psychiatrist and another with a neurologist. The specialty on the panel request shapes the report's framework, what testing is done, which AMA Guides chapters apply, and how restrictions are written. A specialist in workers' compensation law understands which specialty fits which injury and which physicians on a typical panel are honest reporters versus chronic defense leaners.

What happens at the QME evaluation?

The QME conducts a physical examination, takes an occupational and medical history, reviews the medical records both sides provide, and writes a medical-legal report. The report addresses causation, the percentage of permanent disability under the AMA Guides to the Evaluation of Permanent Impairment, 5th Edition (consistent with California Labor Code §4660), apportionment under California Labor Code §4663, the need for future medical care under California Labor Code §4600, and any work restrictions. The evaluation typically lasts 30 to 90 minutes; the report arrives in writing within 30 days of the exam.

What if the QME report comes back wrong?

A flawed QME report is challenged in three ways. First, the worker's attorney can request a supplemental report from the QME, with specific questions correcting misstated job duties, missed body parts, or misapplied AMA Guides chapters. Second, the worker's attorney can depose the QME, on the record, to cross-examine the apportionment analysis and the impairment calculations. Third, if the QME is fundamentally unreliable, the attorney can move for a replacement panel or build the record for a Petition for Reconsideration under California Labor Code §5903 after the trial. The deadline to challenge an adverse Findings and Award is 25 days from service by mail or 20 days from electronic service.

QME vs. AME, what's the difference and which is better?

A QME is selected through the panel-strike process; an AME is agreed on jointly. The right choice depends on the type of dispute and specialist availability.

A QME is selected from a panel and is therefore one side's preferred neutral; an AME is jointly agreed on by both sides and is a true neutral both parties accept. AMEs are generally preferred in represented cases because both sides commit to the physician's findings in advance, which compresses the path to resolution. QMEs are the default in unrepresented cases. A specialist attorney evaluates AME candidates by past reporting record, depositions taken, and the physician's history on apportionment, a good AME selection can be worth more than years of litigation.

What does "apportionment" mean and why does it cut the claim?

Apportionment splits permanent disability between work and non-work causes, and the insurer uses it to reduce the indemnity owed on the claim.

Apportionment under California Labor Code §4663 lets the insurer attribute part of a worker's permanent disability to non-industrial causes, aging, prior injuries, genetics, or pre-existing degenerative changes. If a QME assigns 40% of a worker's disability to pre-existing degenerative disc disease, the permanent disability award is reduced by 40%. The California Supreme Court has held (Brodie v. WCAB, 2007) that asymptomatic pre-existing imaging findings, on their own, are a weak basis for apportionment, the relevant question is whether the worker was symptomatic before the work injury, not whether the MRI is "abnormal." Apportionment is one of the most contested parts of every QME report.

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