ICD-10 Code H47.31 – Coloboma of optic disc (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H47.31 – Coloboma of optic disc
What it is
H47.31 identifies a congenital defect of the optic disc, where part of the disc is missing or underdeveloped. It reflects an anatomic abnormality rather than an acquired optic nerve disease.
Clinical signs
Typical findings include a visibly excavated or malformed optic disc on eye examination. Visual function may vary; clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents a coloboma involving the optic disc or optic nerve head. It is appropriate for congenital eye anomaly records, ophthalmology assessments, or problem lists that specify this defect. Do not infer the diagnosis from nonspecific visual complaints alone.
Do not use for
Do not use it for coloboma of the iris, choroid, or eyelid, which have different codes. Do not assign it when documentation only says “optic nerve abnormality”; check documentation.
Coding tip
Confirm the exact ocular structure named in the record before coding, because “coloboma” alone is not specific enough.