Maximum Medical Improvement (MMI)
Maximum Medical Improvement (MMI) is better defined as the end of the healing period, which is defined as that period for healing the injury, which continues until claimant is as far restored as the permanent nature of the injury will allow. Nix v. Wilson World Hotel, 46 Ark. App. 303, 879 S.W.2d 457 (1994). In the event that the underlying condition has stabilized and there is no additional treatment that will improve claimant's condition, the healing period has ended.
Basically this means, there is nothing else the doctors can do to improve your medical condition.
Example, if you lose part of a finger, you will reach a point where the doctors can no longer do any thing once the wound site has completely healed.
However, you would be entitled to an impairment based on the loss of that body part. This is what workers’ comp mean by a permanent partial impairment. It is completely separate from a disability which effects your ability to function or work.