What is MMI and permanent impairment rating?
MMI is short for Maximum Medical Improvement and simply means you are as good as you are going to get. That is not to say you are as good as you were before the accident, but that your condition has stabilized and you have a loss. It is at that point that some doctors assign, and insurance companies request a permanent impairment rating so they can evaluate the case. This rating is assigned by the doctor based on AMA guidelines.