In this guide14 sections
- Key takeaways
- How TBIs happen at work
- Issue 1: delayed symptoms and late reporting
- Issue 2: a downplayed or disputed diagnosis
- Issue 3: delayed neurological treatment
- Issue 4: contested psychiatric symptoms
- Issue 5: pressure to return to work too soon
- Issue 6: a permanent disability rating that misses the cognitive effects
- Issue 7: denied job retraining benefits
- Issue 8: credibility attacks and surveillance
- A hypothetical example
- Benefits and deadlines at a glance
- Frequently asked questions
- Talk to a California workers’ comp lawyer
A traumatic brain injury (TBI) at work is covered by California workers’ compensation, but these claims are often disputed because symptoms can appear late, scans can look normal, and cognitive or mood changes are hard to measure. The most common problems are late reporting, downplayed diagnoses, delayed neurological care, contested psychiatric symptoms, return-to-work pressure and low permanent disability ratings. Each one has a legal answer, and most depend on acting within set deadlines.
Key takeaways
- Report a head injury in writing right away, even if symptoms seem mild. The statutory notice period is 30 days, and your employer must give you a claim form within one working day of learning of the injury.
- If your employer doesn’t deny the claim within 90 days after you file the claim form, it is presumed covered, and up to $10,000 in treatment must be authorized while it decides.
- For injuries on or after January 1, 2013, a psychiatric condition caused by a physical injury generally can’t raise your rating, but a severe head injury is an exception (Labor Code §4660.1(c)).
- An injury to the brain resulting in permanent mental incapacity is conclusively presumed to be a permanent total disability (Labor Code §4662).
- Employers with five or more employees must engage in the interactive process and consider reasonable accommodations when you return with restrictions.
How TBIs happen at work
Workplace brain injuries usually come from falls from ladders, docks or roofs, slips on wet floors, falling objects, vehicle and forklift crashes, explosions and workplace assaults. Symptoms can include headaches, confusion, dizziness, vision problems, memory loss, trouble concentrating, irritability and depression. Even a concussion can cause symptoms that last.
Issue 1: delayed symptoms and late reporting
Many workers feel “fine” after a blow to the head and only notice problems days later. Insurers sometimes use that gap to argue the injury didn’t happen at work.
- Notice: Labor Code §5400 calls for written notice to your employer within 30 days. Late notice bars a claim only if the employer was misled or prejudiced (§5403), but reporting promptly removes the argument.
- Claim form: your employer must give you a DWC-1 claim form within one working day after learning of the injury (see the DWC’s claim-filing steps).
- Evidence: write down what happened, who saw it and when symptoms started. If no one saw the accident, see how to prove a work-related brain injury without a witness.
Issue 2: a downplayed or disputed diagnosis
An evaluator may call the injury “mild,” suggest you are exaggerating, or say your symptoms are purely psychological. If you disagree with your treating doctor on a medical issue such as diagnosis, work status or permanent impairment, you can object and get an evaluation from a qualified medical evaluator (QME), or an agreed medical evaluator if you have a lawyer and both sides agree. The objection deadline is generally 20 days if you are represented and 30 days if you are not (Labor Code §4062). The evaluator’s specialty matters in a TBI case, so choose it carefully.
Issue 3: delayed neurological treatment
Requests for a neurologist, neuropsychological testing or cognitive rehabilitation go through utilization review. If they are denied, you generally have 30 days after the decision is served to request independent medical review (Labor Code §4610.5). Our guide to neurological treatment for TBIs explains the approval process and the medical provider network’s specialist access rules.
Issue 4: contested psychiatric symptoms
Depression, anxiety and post-traumatic stress often follow a brain injury. Treatment for psychiatric symptoms caused by the work injury is generally part of your medical care. The fight is usually over the rating: for injuries on or after January 1, 2013, Labor Code §4660.1(c) generally bars a psychiatric condition that arises from a physical injury from increasing your permanent disability rating. The exceptions are a violent act and a catastrophic injury, which the statute says includes a severe head injury. Whether your injury qualifies as “severe” is a fact question that often needs medical and legal argument.
Issue 5: pressure to return to work too soon
Memory problems, dizziness and fatigue can make an old job unsafe or impossible. Your treating doctor’s restrictions generally govern your work status unless they are changed through the medical dispute process. Employers with five or more employees must engage in a timely, good-faith interactive process and provide reasonable accommodation for a known disability (Gov. Code §12940(m), (n)), which can include looking for a vacant position you can do. Firing or punishing you because you filed a claim can violate Labor Code §132a. See workers’ comp retaliation.
Issue 6: a permanent disability rating that misses the cognitive effects
For injuries on or after January 1, 2013, permanent disability starts with whole person impairment under the AMA Guides, multiplied by 1.4 and adjusted for occupation and age (Labor Code §4660.1). A rating based only on a normal scan may miss cognitive, behavioral and balance deficits. Neuropsychological testing and detailed reports help capture them. At the far end, Labor Code §4662 presumes total disability for a brain injury resulting in permanent mental incapacity. See permanent total disability.
Issue 7: denied job retraining benefits
If your injury was on or after January 1, 2013, you have a permanent partial disability, and your employer doesn’t offer regular, modified or alternative work that fits your restrictions, you may be entitled to a $6,000 supplemental job displacement voucher. Voucher recipients may also qualify for a one-time $5,000 Return-to-Work Supplement.
Issue 8: credibility attacks and surveillance
Insurers sometimes hire investigators or review social media in brain injury cases. The way to respond is consistency: describe your symptoms the same way to every doctor, follow your restrictions, avoid posting about physical activities, and keep a symptom journal. Family members’ observations of changes in your memory or mood can corroborate what you report.
A hypothetical example
Marcus, a delivery driver, hits his head when his van is rear-ended on a route. He drives back to the yard and finishes his shift. Two days later he has severe headaches and keeps forgetting addresses. He reports the injury in writing that week and gets a claim form. The insurer’s evaluator later says he has “resolved post-concussive symptoms” and can return to full duty. Because Marcus kept a journal and his treating doctor documented ongoing deficits, he can object and pursue a QME evaluation. Because another driver caused the crash, he may also have a separate claim against that driver.
Benefits and deadlines at a glance
| Item | Rule (as of 2026) |
|---|---|
| Temporary disability | Two-thirds of average weekly earnings, $264.61 to $1,764.11 a week; generally up to 104 weeks within five years of injury |
| Medical mileage | 76 cents a mile for travel on or after July 1, 2026 |
| Written notice to employer | 30 days (Labor Code §5400) |
| Employer decision on claim | Presumed covered if not denied within 90 days of the claim form |
| Independent medical review | Generally 30 days after a UR decision is served |
| Objection to treating doctor’s findings | 20 days (represented) or 30 days (unrepresented) |
| Filing with the WCAB | Generally one year from injury, last benefit payment or last treatment (Labor Code §5405) |
| New and further disability | Within five years of the date of injury (Labor Code §5410) |
To estimate your weekly benefits, try our workers’ comp benefits calculator.
Frequently asked questions
Is a concussion at work covered by workers’ comp?
Yes. A concussion is a form of traumatic brain injury, and if it happened on the job, treatment and other benefits are generally available like any other work injury.
My symptoms started a week after the accident. Is it too late?
No. Report the injury in writing as soon as you connect the symptoms to the accident. The statutory notice period is 30 days, and late notice generally doesn’t bar a claim unless the employer was misled or prejudiced.
Can I get workers’ comp for depression after a head injury?
Treatment for depression caused by the work injury is generally covered. Whether it can increase your permanent disability rating depends on whether the head injury was severe enough to count as catastrophic, or involved a violent act.
Can I sue someone besides my employer for a brain injury?
Possibly. If a third party, such as another driver or a property owner, caused the injury, you may have a personal injury claim in addition to workers’ comp. See TBIs and third-party liability.
What if I can never go back to work?
Your permanent disability rating may be high, and a brain injury resulting in permanent mental incapacity is presumed totally disabling under Labor Code §4662. A lawyer can help make sure the medical record supports the full extent of your limits.
Talk to a California workers’ comp lawyer
Employees First Labor Law represents workers exclusively, including injured workers with brain injuries in California workers’ comp cases. We offer free virtual consultations to review your claim, your medical reports and your options. Contact us online or call (310) 853-3461.
This article is general information about California law as of 2026, not legal advice for your situation. Reading it does not create an attorney-client relationship.
