The term "reconstructive" refers to the process of rebuilding something after it has been damaged or destroyed. Birth defects, accident, illness, or age can all lead to face and bodily anomalies that require reconstructive plastic surgery. Reconstructive surgery includes examples such as cleft lip and palate repair and breast reconstruction. Reconstructive plastic surgery is typically performed to improve body function but it can also be done to mimic or improve a normal appearance. Plastic surgery includes reconstructive surgery. Most health insurance companies cover reconstructive surgery because it is considered medically essential.