Think of a dented car after a crash: it may still run, but not like it did before. An impairment rating works the same way for a human body. It is a medical percentage that measures how much permanent physical or mental function has been lost after an injury or illness. Doctors often use the AMA Guides or similar standards to assign that number. The rating is not the same as pain, job loss, or whether someone is officially disabled. It is a medical estimate of lasting damage.

That number can drive real money. In a workers' compensation case, an impairment rating may affect whether an injured worker gets benefits for permanent loss of function and how long those benefits last. In a personal injury case, insurers also look at it because a higher rating can support claims for future care, reduced earning ability, and lasting harm. A low rating, on the other hand, is often used to downplay a serious injury.

In Louisiana, the fight is usually not over whether someone got hurt, but how badly and how permanently. After a wreck on US-61 Airline Highway or a hydroplaning crash in New Orleans floodwater, insurers may act like a modest rating means the person is basically fine. That is nonsense. A rating is one piece of evidence, not the whole case. Louisiana workers' compensation law, including La. R.S. 23:1221, can make that number matter a lot.