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Maximum medical improvement (MMI) is the point when your condition has become stable and further treatment is not reasonably expected to improve it. It does not mean you are healed, pain-free, or done with care. In a personal-injury claim, MMI is usually when a full demand can be valued.[1]C.R.S. § 8-40-201(11.5). Statutory definition of maximum medical improvement — a stable condition when no further treatment is reasonably expected to improve it
Key Takeaways
- MMI means plateau — impairment is stable; more treatment is not reasonably expected to improve the condition.[1]
- Future maintenance care can still be needed. The statute says that does not undo an MMI finding.[1]
- In workers' compensation, an authorized treating physician determines MMI, then rates permanent impairment.[2]C.R.S. § 8-42-107. Authorized treating physician determines MMI; permanent impairment is rated after MMI. https://law.justia.com/codes/colorado/title-8/labor-ii
- In a third-party injury claim, waiting for MMI is how future medical needs and permanent limits get into the demand — not a sign the case is over.
- MMI does not stop Colorado's lawsuit deadline. A motor-vehicle injury case is still generally three years from accrual.[3]C.R.S. § 13-80-101(1)(n). Three-year motor-vehicle lawsuit deadline — MMI does not pause the statute of limitations. https://law.justia.com/codes/colorado/title
How MMI works
Colorado writes the definition into the Workers' Compensation Act: MMI is “a point in time when any medically determinable physical or mental impairment as a result of injury has become stable and when no further treatment is reasonably expected to improve the condition.”[1] Future medical maintenance that will not significantly improve the condition, and ordinary improvement or deterioration from the passage of time, do not block an MMI finding.[1]
That is a workers' compensation definition. Personal-injury (third-party) claims use the same clinical idea even though they are not paid under Title 8. A treating doctor decides the injury has leveled off. Until then, no one can put a complete number on future surgery, ongoing therapy, or lost earning capacity. After MMI, those pieces can be estimated instead of guessed.
This is general information, not a diagnosis or a prediction about your recovery. Only your treating physician can speak to your condition.
Why the demand usually waits
| Before MMI | After MMI |
|---|---|
| Treatment is still expected to change the condition | Condition is considered stable[1] |
| Permanent impairment is not rated yet | In workers' comp, the authorized treating physician rates impairment after MMI[2] |
| Future medical cost is incomplete | Maintenance care, if any, can be projected |
| A settlement release would lock in an unfinished picture | A demand can include past bills plus the stable, long-term picture |
Workers' compensation also uses MMI as a benefits switch: temporary total disability generally runs until MMI, then the case turns to permanent disability if impairment remains.[4]C.R.S. § 8-42-105. Temporary total disability benefits generally continue until MMI (workers' compensation). https://law.justia.com/codes/colorado/title-8/labor[2] A car-crash claim against another driver does not use those benefit names. MMI there is the practical time to send a complete demand in the claim process — while the statute of limitations keeps running.[3]
Worked example
Hypothetical. You herniate a disc in a rear-end crash. Six months of therapy and injections are still changing your function. An early offer covers the bills to date and a modest extra amount. If you sign a full release now, later fusion surgery — if it becomes necessary — is typically yours. At MMI, the doctor may still prescribe pain management. That maintenance does not mean you are “cured,” and it does not mean you were not at MMI.[1] The demand can then include the stable restrictions and the expected future care, not only the ER invoice.
If the at-fault driver carried only minimum bodily injury liability, the medical picture at MMI also tells you whether those limits, and any UIM, can actually reach the loss.
What people get wrong
The myth: “MMI means I'm fully healed, so treatment should stop and I should settle today.” The statutory definition is stability, not cure. Future maintenance that will not significantly improve the condition is compatible with MMI.[1] The other myth is that reaching MMI pauses the lawsuit clock. It does not. A motor-vehicle injury filing deadline is generally still three years from accrual.[3]
Frequently Asked Questions
Does MMI mean I am fully recovered?
No. It means the impairment is stable and further treatment is not reasonably expected to improve it.[1] You can still have pain, restrictions, and maintenance care.
Who decides that I am at MMI?
In workers' compensation, an authorized treating physician makes the MMI determination.[2] In a personal-injury claim, it is a medical judgment by a treating doctor, not an adjuster's call.
Should I settle the day I reach MMI?
MMI is when the long-term picture can be valued, not an automatic close date. A signed release is typically final even if the condition later worsens. Get the MMI report before you discuss a number.
Does MMI stop my workers' comp checks?
Temporary total disability generally ends at MMI.[4] Permanent disability benefits may begin if there is a rated impairment.[2] Personal-injury claims do not use those TTD/PPD labels.
What if I still need treatment after MMI?
Maintenance care that will not significantly improve the condition does not undo MMI.[1] Those future costs belong in the valuation. They are not proof that MMI was wrong by themselves.
Bottom Line
MMI is a plateau, not a clean bill of health.[1] Injury demands usually wait for it so permanent harm and future care are in the number — while Colorado's filing deadline keeps moving.[3] If a doctor has placed you at MMI and a settlement paper is already in the mail, a second look is cheaper than a release you cannot undo. Call (720) 432-7032 for a free consult.
Article Sources
- C.R.S. § 8-40-201(11.5). Statutory definition of maximum medical improvement — a stable condition when no further treatment is reasonably expected to improve it. https://law.justia.com/codes/colorado/title-8/labor-ii-workers-compensation-and-related-provisions/workers-compensation/article-40/part-2/section-8-40-201/. Accessed September 8, 2026. ↩
- C.R.S. § 8-42-107. Authorized treating physician determines MMI; permanent impairment is rated after MMI. https://law.justia.com/codes/colorado/title-8/labor-ii-workers-compensation-and-related-provisions/workers-compensation/article-42/section-8-42-107/. Accessed September 8, 2026. ↩
- C.R.S. § 13-80-101(1)(n). Three-year motor-vehicle lawsuit deadline — MMI does not pause the statute of limitations. https://law.justia.com/codes/colorado/title-13/limitation-of-actions/article-80/section-13-80-101/. Accessed September 8, 2026. ↩
- C.R.S. § 8-42-105. Temporary total disability benefits generally continue until MMI (workers' compensation). https://law.justia.com/codes/colorado/title-8/labor-ii-workers-compensation-and-related-provisions/workers-compensation/article-42/section-8-42-105/. Accessed September 8, 2026. ↩
This article is for general informational purposes only and is not legal or medical advice. Reading it does not create an attorney-client relationship. For advice about your specific situation, consult a qualified attorney and your treating physician.
Written by
Elliot Singer, Esq.
Personal injury attorney at Conduit Law, dedicated to helping Colorado accident victims get the compensation they deserve.
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