A finding of lasting physical or mental loss can directly change settlement value, eligibility for benefits, and the amount of future wage-loss evidence in a case. It can increase the weight of a damages claim, support a workers' compensation award, or strengthen proof that an injured person will not return to the same job or earning level.

Technically, permanent impairment is a medically determined, lasting reduction in body function that remains after maximum healing has occurred. Doctors usually evaluate it after maximum medical improvement (MMI), when further treatment is not expected to produce major recovery. The rating measures loss of function in a body part, organ system, or the whole person. It is not the same as disability. Impairment is a medical judgment about function; disability is a legal and vocational question about how that condition affects work and daily activities.

In practice, the distinction matters. A low impairment rating does not automatically mean a small case, and a high rating does not guarantee full wage replacement. Pain, job demands, age, education, and future treatment can still affect value. For someone working heavy labor in Louisiana, even a modest permanent loss of motion or strength may carry major earning consequences.

Louisiana does not use one universal impairment formula for all injury claims. In workers' compensation, permanent loss or loss of use of certain body parts is addressed by the scheduled-loss provisions in La. R.S. 23:1221(4), while broader wage-loss issues may fall under supplemental earnings benefits under La. R.S. 23:1221(3).