Types of injuries

Back, neck and disc injuries at work in California

By the Work Injury Compass editorial team · Last updated November 2026 · How we write and check guides

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Specific injury or cumulative trauma?

California law treats a work injury as either specific (one event, on one date) or cumulative (repeated activity over time) (Labor Code §3208.1). Back and neck claims are often both: years of lifting wear a disc down, then one bad lift causes a herniation. You can claim both, and it matters because the dates, the employers involved and the deadlines can be different.

• Specific injury: report it right away and name the date, time, task and every body part that hurts. Neck pain that shows up a few days after a fall belongs on the same report.
• Cumulative injury: the "date of injury" is when you first lost time or needed treatment and knew, or should have known, that work caused it (Labor Code §5412). See cumulative trauma claims.

Jobs that lead to spine claims are the ones you'd expect: warehouse picking and loading, delivery and truck driving, construction, nursing and home care (patient lifting), hotel housekeeping, janitorial work, farm work, and long hours at a poorly set-up desk.

Getting care: your doctor and the MPN

Report the injury, ask for a DWC-1 claim form, and return it. Within one working day after you file it, the employer must authorize treatment, up to $10,000, while the claim is being decided (Labor Code §5402). If your employer uses a Medical Provider Network, you'll usually be treated by a doctor in that network, but after the first visit you can switch to another doctor in the MPN (see choosing a workers' comp doctor). For spine injuries, pick a treating doctor who actually treats spines, such as an orthopedist, physiatrist or spine specialist, not just a clinic that hands out work notes.

MRIs, injections and surgery: utilization review

Your doctor requests treatment; the insurer sends the request to utilization review (UR), which checks it against the state's treatment guidelines, the Medical Treatment Utilization Schedule. UR generally must decide within five business days of getting the request and the information it needs, and never more than 14 days from the doctor's recommendation; urgent requests get 72 hours (Labor Code §4610).

Common spine disputes in UR:

• MRI denied as "too early." Guidelines often expect a period of conservative care first unless there are red flags, such as numbness or weakness that gets worse, or bladder or bowel changes. Ask your doctor to document those findings in the request.
• Epidural injections, more physical therapy or chiropractic modified to fewer visits.
• Surgery (discectomy, fusion) denied for missing imaging or test results.

If UR denies or changes the request, you can ask for Independent Medical Review (IMR). The request is due 30 days after the UR decision is served on you (10 days for drug-formulary disputes) (Labor Code §4610.5). Send the IMR form that came with the denial, plus any records you think matter. Full details are in utilization review and IMR.

Light duty and temporary disability pay

While you heal, your doctor writes work restrictions, such as "no lifting over 15 pounds" or "no repetitive bending." If your employer can accommodate them, you go back on modified duty. If it can't, or you're fully off work, you should get temporary disability (TD): about two-thirds of your average weekly wage, between $264.61 and $1,764.11 a week for 2026 injuries. Our TD calculator estimates your rate. Be careful with light duty that doesn't match your restrictions: tell the supervisor in writing and tell your doctor at the next visit. See return to work and modified duty.

How a back or neck injury is rated

When your condition stops improving, the doctor declares you "permanent and stationary" (or at maximum medical improvement) and measures permanent impairment. For injuries on or after January 1, 2013, impairment is measured with the AMA Guides, 5th edition, and then adjusted for your occupation and age to get a permanent disability percentage (Labor Code §4660.1). For the spine, the Guides usually place you in a category based on objective findings. Radiculopathy (nerve symptoms confirmed on exam or testing), surgery and loss of motion-segment integrity generally rate higher than muscle strain alone. Each percentage point turns into weeks of payments; see permanent disability explained.

Apportionment: "it's just degeneration"

Almost every adult MRI shows some degeneration, and insurers use that. Permanent disability is apportioned by causation: the doctor must estimate what percentage of the disability was caused by the work injury and what percentage by other factors, such as prior injuries or the natural progression of a condition (Labor Code §4663). Note that this applies to permanent disability. Your medical treatment and TD for the industrial injury aren't reduced because you had a degenerative spine. A well-reasoned medical report matters a lot here, and it's one of the most common reasons spine cases end up before a QME or AME.

Common disputes and how to avoid them

• "You didn't report it right away." Report in writing within 30 days (Labor Code §5400), sooner if you can.
• Prior back problems. Disclose earlier injuries honestly when asked (Labor Code §4663 requires it on request). Hiding them damages your credibility far more than the old injury damages your claim.
• Gaps in treatment. Missing appointments for months lets the insurer argue you recovered.
• Surveillance and social media. Spine claims are a common target. Don't do anything you've told your doctor you can't do.
• Denied claim. If the claim is denied, you have options; see what to do if your claim is denied.

This guide is general information, not legal advice. Every case is different. For free help from the state, call the DWC Information & Assistance unit at 1-800-736-7401.