ICD-10 Code H05.20 – Unspecified exophthalmos (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H05.20 – Unspecified exophthalmos
What it is
H05.20 identifies exophthalmos, or abnormal forward protrusion of the eyeball, when the type or cause is not specified. Use it when documentation confirms proptosis but does not name a more specific orbital disorder.
Clinical signs
Findings may include visible eye prominence, lid retraction, or incomplete eyelid closure. Clinical features vary; refer to documentation for laterality, severity, and any associated orbital or thyroid findings.
When to use this code
Use this code when the provider documents exophthalmos without further detail. It may apply to an eye exam, specialist note, or discharge summary that records protrusion of the eye but does not identify the underlying cause. Check documentation for a more specific diagnosis before assigning H05.20.
Do not use for
Do not use this code if the record identifies thyroid eye disease, orbital mass, trauma, or another specific cause. Do not assign it for normal eye prominence or for nonspecific swelling around the eye.
Coding tip
Query for laterality and cause when the note says “proptosis” or “bulging eye” but the documentation is incomplete.