ICD-10-CM > E00-E89 > E20-E35 > E22 E22 Hyperfunction of pituitary gland Non-Billable/Non-Specific Type 1 Excludes Cushing's syndrome (E24.-)Nelson's syndrome (E24.1)overproduction of ACTH not associated with Cushing's disease (E27.0)overproduction of pituitary ACTH (E24.0)overproduction of thyroid-stimulating hormone (E05.8-) Codes E22.0Acromegaly and pituitary gigantismE22.1HyperprolactinemiaE22.2Syndrome of inappropriate secretion of antidiuretic hormoneE22.8Other hyperfunction of pituitary glandE22.9Hyperfunction of pituitary gland, unspecified