Cosmetic surgery is performed to reshape normal body structures to improve appearance and self-esteem. It is usually not included in health insurance because it is optional. Reconstructive surgery is performed on abnormal body structures resulting from birth defects, trauma, infection, tumor, or disease. Usually, it is done to improve performance, but it can also be eliminated to balance the normal look. It is usually covered by many health insurance policies, although the inclusion of specific procedures and coverage rates may vary widely.