Medical records
Maximum medical improvement (MMI)
Maximum medical improvement is the point at which a patient's condition has stabilized and no further significant recovery is expected — the milestone that triggers impairment ratings and reshapes settlement posture in injury and workers' compensation cases.
MMI does not mean recovered. It means plateaued: further treatment may maintain function or manage pain, but the underlying condition is not expected to materially improve. The determination is a clinical judgment, usually made by the treating physician — or contested by an examiner retained by the other side.
Why it matters in practice
MMI is a hinge date. In workers’ compensation it typically ends temporary disability benefits and triggers the permanent impairment rating that drives the award. In personal-injury litigation it marks when damages become calculable — future care needs, permanent restrictions, and residual pain can finally be valued, which is why plaintiffs rarely want to settle before MMI and defendants often push to resolve early.
The date is also a battleground: a treating physician’s MMI finding may sit months apart from a defense examiner’s, and each side’s number moves the damages model. Watch for the chart sequence around the declared date — continued objective findings after “MMI” cut one way; pre-MMI visit notes reading “plateau” cut the other.
In the fact record
MMI turns on the treatment timeline — trajectory, plateau, and what every provider said about prognosis. A chronology with each opinion dated and cited makes the competing MMI dates an argument you can actually referee.