California's workers' compensation system treats psychiatric injury claims differently from physical injury claims, and the distinction is not subtle. Labor Code 3208.3 creates a threshold structure that bars a substantial category of psychiatric claims outright. Practitioners who do not analyze threshold early in the case risk investing significant time and resources in a claim that cannot survive a defense motion.
The Six-Month Employment Requirement
Under Labor Code 3208.3(d), an employee must have been employed by the employer for at least six months before filing a psychiatric injury claim. The requirement is not six months with any employer; it is six months with the specific employer against whom the claim is filed.
There are two statutory exceptions. First, the requirement is waived when the psychiatric injury is caused by a sudden and extraordinary employment condition. Courts have interpreted this exception narrowly; routine accidents, even serious ones, do not automatically qualify. The event must be outside the normal spectrum of employment conditions. Second, the requirement does not apply when the psychiatric injury results from a discriminatory act against the employee. If the precipitating event is a hostile-environment harassment claim, the six-month bar may not apply.
For cases near the threshold, document the exact hire date and the date of the precipitating event carefully. Disputes over a few weeks of employment can determine whether the claim proceeds at all.
The Predominant Cause Standard
For most psychiatric claims, Labor Code 3208.3(b)(1) requires that actual events of employment were the predominant cause of the psychiatric injury. Predominant cause means more than 50 percent of the causation. This is a higher threshold than the standard for physical injury claims, where any contribution to the industrial injury is sufficient.
In practice, the predominant-cause standard requires a psychiatric AME or PQME who is prepared to quantify industrial causation at more than 50 percent. An expert who says only that employment "contributed" to the psychiatric condition without specifying a percentage, or who assigns 40 percent industrial causation, will not clear the threshold. The QME must affirmatively find predominant industrial causation in their report.
Non-industrial factors like pre-existing depression, anxiety disorders, relationship problems, and financial stress are legitimate considerations in the apportionment analysis. Defense QMEs will exploit any documented non-industrial stressors to argue industrial causation is less than predominant. Before the psychiatric QME appointment, review the entire medical record for documented psychiatric history and non-industrial stressors, and be prepared to address them with your own retained expert if the case is litigated.
The Violent Act Exception
Labor Code 3208.3(h) provides a significant exception to both the six-month rule and the predominant-cause standard: when the psychiatric injury results from a violent act directed against the employee in the workplace, neither the employment-duration requirement nor the predominant-cause threshold applies.
The violent act exception covers armed robbery, workplace assault, and similar events. Courts have examined what qualifies as a violent act carefully. A physical altercation with a co-worker can qualify if it involved actual violence, not merely a verbal confrontation. The employee does not have to be the direct victim; witnessing workplace violence directed at others can also support a psychiatric claim under this exception if the psychiatric injury flows from the traumatic event.
This exception is particularly important in cases involving healthcare workers, security personnel, convenience store and retail employees, and other occupations with elevated workplace violence risk. When a qualifying violent event is identified, the psychiatric claim bypasses the most common threshold defenses entirely.
The Personnel Action Defense
Labor Code 3208.3(h) also provides a significant exclusion in the opposite direction: if the psychiatric injury is caused by a lawful, nondiscriminatory, good-faith personnel action, the claim is not compensable even if the employee genuinely suffers a psychiatric condition as a result.
Lawful personnel actions include layoffs, terminations for legitimate business reasons, performance reviews, written discipline, denial of promotion, and workplace investigations. The key word is good faith; if the employer used the disciplinary process as a pretext for discriminatory conduct, the exclusion may not apply. Courts look at whether the action was genuinely consistent with established employer policy and whether similarly situated employees were treated the same way.
Defense counsel routinely invoke the personnel action exclusion when a psychiatric claim arises in the context of a disciplinary proceeding or termination. Claimants' counsel should investigate whether the personnel action was actually consistent with company policy, whether progressive discipline was followed, and whether there is evidence of discriminatory motive. If the action was discriminatory, both the exclusion and the six-month rule may be defeated simultaneously.
Selecting the Right Psychiatric AME or PQME
Because the predominant-cause analysis is so heavily dependent on expert opinion, the selection of the psychiatric AME or panel QME is critical. Review available IMR decisions and prior WCAB panel decisions involving the panel candidates before agreeing on a name. An AME who routinely finds predominant industrial causation is a different case than one who applies a skeptical apportionment methodology.
Prepare your client thoroughly for the psychiatric evaluation. Provide the evaluator with a complete chronology of the workplace events, organized by date, with supporting documentation. The evaluator should have every incident report, every email or text message related to the workplace events, and any witness statements. A psychiatric evaluation based on an incomplete factual record is vulnerable to reconsideration when new facts emerge.
For cases that also involve a physical injury with a psychiatric overlay, coordinate the psychiatric AME's opinion with the treating physician's documentation of how the physical condition has affected the employee's mental health. Psychiatric claims that arise secondary to a serious physical industrial injury often have the strongest causation record.
See our broader coverage of workers' compensation practice at workers comp and related practice operations resources for case management strategies when psychiatric claims are embedded in complex multi-condition cases.