H47.4Disorders of optic chiasm

H47.4 is the ICD-10-CM diagnosis code for disorders of optic chiasm. It belongs to category H47 (other disorders of optic [2nd] nerve and visual pathways), block H46-H47 (disorders of optic nerve and visual pathways) and chapter 7 (diseases of the eye and adnexa). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within H47 (other disorders of optic [2nd] nerve and visual pathways), H47.4 is specifically for disorders of optic chiasm. Related codes cover disorders of optic nerve, not elsewhere classified (H47.0), papilledema (H47.1), optic atrophy (H47.2), other disorders of optic disc (H47.3), disorders of other visual pathways (H47.5), disorders of visual cortex (H47.6) and unspecified disorder of visual pathways (H47.9).

To report this condition, pick the subcode that matches the documentation: H47.41 (in (due to) inflammatory disorders), H47.42 (in (due to) neoplasm), H47.43 (in (due to) vascular disorders) and H47.49 (in (due to) other disorders).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.