ICD-10-CM > H00-H59 > H46-H47 > H47 > H47.4 H47.4 Disorders of optic chiasm Non-Billable/Non-Specific Code Also underlying condition Codes H47.41Disorders of optic chiasm in (due to) inflammatory disordersH47.42Disorders of optic chiasm in (due to) neoplasmH47.43Disorders of optic chiasm in (due to) vascular disordersH47.49Disorders of optic chiasm in (due to) other disorders