Reconstructive surgery is performed to treat structures of the body affected aesthetically or functionally by congenital defects, developmental abnormalities, trauma, or disease. It is generally done to improve function and ability, but may also be performed to achieve a more typical (i.e. normal) appearance of the affected area. Done well, it restores not only the affected structures or parts of the face and body, but greatly restores the spirit and confidence of the patient. Reconstructive surgery is generally covered by most health insurance policies, although coverage for specific procedures and levels of coverage may vary greatly.