In this guide11 sections
- Key takeaways
- What MMI means in California
- What comes next: the timeline after MMI
- Your temporary disability payments stop
- Your permanent disability rating is calculated
- If you disagree with the MMI report
- Medical treatment after MMI
- Going back to work after MMI
- Steps to take when you’re declared at MMI
- Frequently asked questions
- Talk to a California workers’ comp lawyer
Maximum medical improvement (MMI) means your work injury has stabilized and isn’t expected to change substantially in the next year, with or without treatment. In California workers’ comp it’s usually called “permanent and stationary” (P&S). Reaching MMI doesn’t mean you’re healed or that your claim is over. It means temporary disability usually ends, permanent disability payments should begin, your rating is calculated, and you have short deadlines to act if you disagree.
Key takeaways
- At MMI, your treating doctor writes a report on permanent impairment, work restrictions and future medical care. That report drives the value of your claim.
- Permanent disability payments are generally due within 14 days after your last temporary disability payment, even before your final rating (Labor Code §4650(b)).
- If you disagree with the report, you must object in writing within 20 days if you have a lawyer, or 30 days if you don’t (Labor Code §4062(a)).
- Medical care doesn’t automatically stop at MMI. Future treatment can continue unless you settle it away.
- If your employer doesn’t offer suitable work within 60 days, you may get a $6,000 retraining voucher (injuries on or after 2013).
What MMI means in California
California’s medical reporting rules define permanent and stationary status as the point when you have reached maximal medical improvement: your condition is well stabilized and unlikely to change substantially in the next year (8 CCR §9785). So MMI and P&S describe the same stage of your case. We explain the two terms side by side in P&S versus MMI.
MMI is a medical finding, usually made by your primary treating physician. A qualified medical evaluator (QME) or agreed medical evaluator (AME) can also address it if there’s a dispute. You may still have pain, restrictions or a need for medication. Those lasting effects are what permanent disability is meant to pay for.
What comes next: the timeline after MMI
| What happens | Timing | Law |
|---|---|---|
| Doctor issues the permanent and stationary report, with impairment, restrictions, future medical care and apportionment | After the MMI exam | 8 CCR §9785 |
| Temporary disability ends; the last check comes with a notice on whether permanent disability is payable | With the last TD payment | Labor Code §4061(a) |
| Permanent disability advances start, based on a reasonable estimate | Within 14 days of the last TD payment, then every two weeks | Labor Code §4650(b), (c) |
| Deadline to object to the treating doctor’s findings | 20 days (represented) or 30 days (unrepresented) after receiving the report | Labor Code §4062(a) |
| Employer decides whether to offer regular, modified or alternative work | Within 60 days after the claims administrator receives the report | Labor Code §4658.7 |
| Settlement or award | After the rating is known; a judge must approve | Labor Code §5001 |
| Petition if your condition gets worse | Within five years of the date of injury | Labor Code §5410 |
Your temporary disability payments stop
Temporary disability (TD) replaces part of your wages while you recover. Once you’re at MMI, TD generally ends, because you are no longer “temporarily” disabled. TD for injuries on or after 2008 is also capped at 104 weeks within five years of the injury for most conditions, whether or not you’ve reached MMI.
The gap between TD and permanent disability is where many workers get squeezed. Labor Code §4650 requires the first permanent disability payment within 14 days after the last TD payment, even if the extent of your disability isn’t known yet. If a payment is late, it is generally increased by 10% automatically. See TD versus PD benefits for how the two differ.
Your permanent disability rating is calculated
For injuries on or after January 1, 2013, the doctor’s whole person impairment (WPI) under the AMA Guides is multiplied by 1.4 and adjusted for your occupation and age (Labor Code §4660.1). Apportionment to non-work causes can reduce it (Labor Code §4663). The final percentage sets the number of weeks you’re paid, at $160 to $290 a week for injuries on or after 2014.
For example, a 15% final rating equals 50.5 weeks of payments. At the $290 maximum weekly rate, that is $14,645. A rating of 70% or more adds a life pension, and 100% is paid for life. Our guide to how permanent disability ratings are calculated walks through each step, and our workers’ comp calculator estimates the dollars.
If you don’t have a lawyer and go through a panel QME, the state’s Disability Evaluation Unit calculates a rating within 20 days of receiving the QME report, and you can ask for reconsideration within 30 days of receiving it (Labor Code §4061).
If you disagree with the MMI report
Common problems include being declared at MMI before a recommended surgery has been decided, a body part left out of the report, an impairment number that doesn’t match your limits, or a vague future medical section. You’re not stuck with the report:
- Object on time. Under Labor Code §4062(a), a written objection is due within 20 days of receiving the report if you have a lawyer, or 30 days if you don’t.
- Get a medical-legal evaluation. Unrepresented workers request a panel of three QMEs and must pick one and schedule within 10 days of the panel being issued, or the employer may choose (Labor Code §4062.1). Represented workers can use a panel QME or agree on an AME (Labor Code §4062.2). See QME versus AME.
- Ask for a supplemental report or deposition. The evaluator can be sent missing records or questions, or be questioned under oath.
Treatment denials are different. If utilization review denies or modifies a treatment request, the remedy is independent medical review, which you must request within 30 days of service of the decision.
Here is a hypothetical. Luis, a delivery driver, has knee surgery and is declared at MMI eight months later with 8% WPI. The report says nothing about his lower back, which started hurting when he began limping. Because he has a lawyer, his attorney objects within 20 days, and the back is evaluated by a QME before the rating is finalized.
Medical treatment after MMI
MMI doesn’t end your right to care. If the report says you need future medical treatment, such as medication, injections, therapy or a future surgery, your employer must generally keep providing reasonable treatment for the injury. Requests still go through utilization review.
How you resolve the case matters. A stipulated award usually keeps future medical care open. A compromise and release usually closes it in exchange for a lump sum. See C&R versus stipulated award before choosing.
Going back to work after MMI
Your permanent restrictions decide what work you can safely do. If your employer can accommodate them, you may return to your job or a modified one. If you have permanent partial disability and your employer doesn’t offer qualifying regular, modified or alternative work within 60 days of receiving the report, you’re entitled to a supplemental job displacement voucher of up to $6,000 for retraining (Labor Code §4658.7). Voucher recipients may also apply for a one-time $5,000 Return-to-Work Supplement within one year of receiving the voucher.
Under California’s Fair Employment and Housing Act, an employer with five or more employees generally must engage in a good-faith interactive process and consider reasonable accommodation for your restrictions. Firing you because you filed a workers’ comp claim can violate Labor Code §132a. See permanent work restrictions in workers’ comp.
Steps to take when you’re declared at MMI
- Get the full permanent and stationary report, not just the insurer’s letter summarizing it.
- Check that every injured body part, your restrictions and future medical care are included.
- Calendar your objection deadline the day you receive the report.
- Watch for permanent disability advances within 14 days of your last TD check.
- Keep any job offer in writing and compare it to your restrictions.
- Don’t sign a settlement until your rating and future medical needs have been checked.
Frequently asked questions
Does reaching MMI mean my workers’ comp case is over?
No. It moves your case from the recovery stage to the permanent disability stage: rating, return-to-work decisions, future medical care and settlement.
Can I still see my doctor after MMI?
Yes, if the report finds you need future medical care and you haven’t settled it away. Treatment requests still go through utilization review.
What if my doctor says I’m at MMI too early?
Object in writing within the deadline (20 or 30 days) and ask for a QME or AME evaluation. Tell the evaluator about any treatment that is still pending.
What if my condition gets worse after MMI?
You can generally petition to reopen for new and further disability within five years of the date of injury (Labor Code §5410). If your doctor takes you off work again, TD may restart if you have TD weeks left.
How long does it take to reach MMI?
There’s no set timeline. It depends on the injury and the treatment you need; surgery or complications usually push it later. Temporary disability can still run out at 104 weeks for most injuries even if you haven’t reached MMI.
Talk to a California workers’ comp lawyer
Employees First Labor Law represents workers exclusively, including injured workers reaching the end of treatment. We offer free virtual consultations to review your MMI report, your rating and your deadlines. 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.
