Permanent disability is that degree of disability or impairment that remains after the employee has reached the point of maximum healing. A permanent disability may be partial or total. If a person suffers a permanent partial disability, the person is entitled to a permanent disability rating and award even though he or she may be able to return to work. Permanent disability ratings are provided under the law in the form of money payments, the amount of which depends on a number of things, including the injured worker’s age, occupation, the part of the body injured, and the extent of the disability. Disputes often arise regarding how much of the disability is due to the injury, and how much is due to the preexisting condition.