Gender Reassignment Process. We strictly adhere to internationally recognised guidelines for progressing to such surgery. We know it is self-evident but these are, for the most part, irreversible surgeries. Individuals will be expecting to be living in their new gender role for 1 year, have written confirmation of diagnosis from a doctor. The WPATH is a multidisciplinary professional society representing the specialties of medicine, psychology, social sciences and law. This organization has published clinical guidelines regarding health services for patients with gender disorders, and these guidelines are used in the health plan's medical policy. Transgender portal. v. t. e. Male-to-female sex reassignment surgery involves reshaping the male genitals into a form with the appearance of, and as far as possible, the function of female genitalia. Before any surgery, patients usually undergo feminizing hormone therapy, though this is not a requirement.