Maximum medical improvement (MMI) is a term that’s generally used in workers compensation claims to describe when an injured worker has either fully healed from their serious injury or they have reached a point in their healing where further treatment would not improve their condition. Reaching maximum medical improvement probably sounds like a good thing, but for injured workers, this is not always the case. In many cases, reaching MMI means that the injured worker cannot make any further improvement in their health or mobility, even if they received additional treatment. So they may be partially or completely disabled moving forward, and further treatment cannot really change this fact.