Ind. Code § 25-1-22-2

Sec. 2. As used in this chapter, "gender reassignment surgery" means any medical or surgical service that seeks to surgically alter or remove healthy physical or anatomical characteristics or features that are typical for the individual's sex, in order to instill or create physiological or anatomical characteristics that resemble a sex different from the individual's sex, including genital gender reassignment surgery or nongenital gender reassignment surgery knowingly performed for the purpose of assisting an individual with a gender transition.