Torn Meniscus or ACL From Work: What Does California Workers' Comp Cover?

Does Workers' Comp Cover a Meniscus or ACL Tear From Work?

Yes. If your job caused the tear, or made an old knee problem worse, California workers' comp covers it the same way it covers any other work injury.

California runs on a no-fault rule. Under Labor Code 3600, your employer owes you benefits for an injury that arises out of your job and happens in the course of your work, regardless of who was at fault. You do not have to prove your employer did anything wrong. You only have to show the injury is connected to your job.

The meniscus is a wedge of cartilage that cushions your knee. The ACL is a ligament that keeps the knee from sliding out of place. According to the National Institute of Arthritis and Musculoskeletal and Skin Diseases, an awkward twist or pivot can tear the cartilage, and a knee that is overextended or twisted can tear the ligament. On the job, that can mean a fall from a ladder, a slip on a wet floor, a twist while carrying a load, or a bad landing after a jump.

Not every knee injury comes from one bad moment. Years of kneeling, squatting, or working on uneven ground can wear the same parts of the knee down over time. California treats this kind of gradual injury as a work injury too.

How Do You Prove Your Knee Injury Happened at Work?

Report it in writing within 30 days, see the doctor your claim requires, and let the medical record connect the tear to your job.

Tell your employer in writing as soon as you can. Labor Code 5400 gives you 30 days from the injury to do this, so do not wait.

Once you file a claim form, the insurer has 90 days to accept or deny it. Under Labor Code 5402, if they miss that window, the injury is presumed covered, and they can only fight it later with evidence they did not have at the time. While they decide, the law still makes them cover your first $10,000 of treatment.

Your treating doctor builds the medical proof. An exam, your symptoms, and usually an MRI are what connect a knee tear to the fall, twist, or job duty that caused it. Keep every appointment, and describe what happened the same way each time.

You generally have one year to start a claim under Labor Code 5405, counting from the date of injury, the end of any temporary disability payments, or your last medical treatment, whichever comes latest. If a gradual wear injury, rather than one incident, caused your tear, a different filing clock applies. See the cumulative injury question below.

Will Workers' Comp Pay for Knee Arthroscopy, Meniscus Repair, or ACL Surgery?

Yes, when your treating doctor shows the surgery is medically necessary, though the insurer reviews the request first and can modify or deny it.

Labor Code 4600 requires your employer to pay for all care that is reasonably needed to cure or relieve your injury, including arthroscopy, a meniscus repair, or an ACL reconstruction. You owe no copay and no deductible.

You will usually need to see a doctor inside your employer's medical provider network, called an MPN, unless you named your own doctor in writing before you got hurt. If your assigned doctor is not the right fit, you can ask the network for a different one.

Before most surgery, your doctor's request goes through utilization review, or UR. A reviewer checks the request against the state's treatment guidelines and can approve, modify, or deny it. If UR denies the surgery, you can appeal to an outside doctor through independent medical review, or IMR. Labor Code 4610.5 gives you only 30 days from the denial notice to file that appeal.

Step	What happens	Your deadline
Treatment request	Your doctor asks the insurer to approve care	None
Utilization Review	A reviewer approves, modifies, or denies it	Days
Denied	You request Independent Medical Review	30 days to appeal
IMR decision	A neutral doctor decides on the records	Final and binding

A meniscus trim is a smaller procedure than a full ligament reconstruction, and both differ from a joint replacement. If the joint itself is damaged badly enough that your doctor recommends replacing it, see our guide to total knee replacement claims. For how insurers calculate and pay for knee surgery in general, see how much workers' comp pays for knee surgery.

How Long Are You Off Work After Knee Surgery?

While your doctor keeps you off work, temporary disability pays about two-thirds of your average wage, up to a legal time limit.

Under Labor Code 4653, temporary disability, or TD, pays about two-thirds of your average weekly wage while a doctor keeps you off work or on reduced duty. Light duty can sometimes bring you back sooner, even before your knee has fully healed.

Labor Code 4656 caps these payments at 104 weeks within five years for most injuries. A short list of severe conditions, such as amputations or severe burns, gets more weeks. A meniscus or ACL tear is not on that list, so the standard cap applies.

Your own time off depends on your injury, your surgery, and your job. Office work may allow an earlier return on light duty than a job that requires kneeling, climbing, or standing all day. Your treating doctor, not the insurer, decides when you are ready to go back.

How Is a Knee Injury Rated for Permanent Disability?

Once your knee is as healed as it will get, a doctor rates the lasting damage on a 0 to 100 percent scale, and that rating sets your benefit.

For injuries on or after January 1, 2013, California rates permanent impairment under Labor Code 4660.1. A doctor measures how much lasting function your knee lost under the AMA Guides, and that number is multiplied by a 1.4 adjustment factor set by law. The result is then adjusted again using a separate state schedule of age and occupation modifiers. We do not print impairment percentages here, because the right number depends on your own exam and records.

Insurers often try to lower that rating by blaming part of it on age, arthritis, or an old knee injury. This is called apportionment. Labor Code 4663 requires a real medical reason for any split, not a guess. A doctor cannot just write that some of it is arthritis and stop there. The one shortcut the law gives the insurer is Labor Code 4664: if you already have a prior permanent disability award for the same knee, that old disability is presumed to still exist. Without a prior award on file, the insurer still has to prove the split with real medical evidence, not just your age or a note about wear and tear.

The table below shows how a rating turns into weeks of pay, with a lifetime monthly check added at the top ratings. Our guide to permanent disability ratings explains the scoring process in full.

PD rating	Benefit weeks	Award at the 2026 max ($290/wk)
10 percent	30 weeks	$8,700
20 percent	75 weeks	$21,750
30 percent	130 weeks	$37,700
40 percent	200 weeks	$58,000
50 percent	270 weeks	$78,300
60 percent	350 weeks	$101,500
70 percent	430 weeks	$124,700 plus a life pension

Getting Help With a Meniscus or ACL Workers' Comp Claim

A lawyer tends to help most when a surgery is denied, the insurer disputes the cause of your tear, or a settlement offer is on the table.

Yazdchi Law P.C. is based in Palmdale and represents injured workers throughout California. The firm reviews each case on its own facts and decides separately whether it will take it.

If an insurer denied your arthroscopy or ACL surgery, blamed your knee on age or an old injury without a real medical reason, or sent a settlement offer you are unsure about, a short conversation with a lawyer can help you see where you stand. The first call costs nothing.

Call (661) 273-1780 or use the contact form to set up a free consultation.