gender reassignment

:  the act or process of changing from living as a person of one sex to living as a person of the opposite sex by undergoing surgery, hormone treatment, etc. to obtain the physical appearance of the opposite sex But the number of teenagers going through gender reassignment has been growing amid wider acceptance of transgender identity, more parental comfort with the treatment and the emergence of a number of willing practitioners.—Anemona Hartocollis, The New York Times, 17 June 2015 … the Affordable Care Act prohibits health insurance companies from discriminating against transgender people, opening the door to coverage that includes gender reassignment surgery.—Terry O'Neill, The Huffington Post, 8 Sept. 2014