Maximum Medical Improvement [MMI] Law and Legal Definition

Maximum medical improvement (MMI) is the point at which the condition of an injured person is stabilized. No further recovery or improvement is expected even with additional medical intervention. Basically, a condition is at maximum medical improvement if it is not believed that the condition will change or progress. This term is most often used in the context of a worker’s compensation claim. An inquired employee usually receives temporary benefits until reaching maximum medical improvement

The following is an example of a state statute (Ohio) on maximum medical improvement.

Maximum medical improvement is a treatment plateau at which no fundamental, functional or physiological change can be expected within reasonable medical probability in spite of continuing medical or rehabilitative procedures.[OAC Ann. 4121-3-32]