F01-F99 Mental, Behavioral and Neurodevelopmental disorders
F60-F69 Disorders of adult personality and behavior
Gender identity disorders F64
Gender identity disorders F64-
A disorder characterized by a strong and persistent cross-gender identification (such as stating a desire to be the other sex or frequently passing as the other sex) coupled with persistent discomfort with his or her sex (manifested in adults, for example, as a preoccupation with altering primary and secondary sex characteristics through hormonal manipulation or surgery).