This question comes up a lot because some people think there is a magic formula for the number of treatments needed to maximize your injury claim. Treatment should be as long as necessary for the injury sustained. The doctors or physical therapist, in cooperation with the patient, should determine how long treatment should be. If the doctor or patient believes that full or optimal recovery has been achieved, then treatment should stop. The goal of treatment is to make you as whole as you were the day before the accident. Any pre-existing conditions should not be considered in the current medical bills, but may be considered if the car accident made existing injuries worse. Your health is paramount but once you accept compensation for your injury, you can no longer claim any more injuries from the given accident. That is why it is important to maintain the goal of treatment, which is to make you as whole as possible.