ICD-10 Code H21.0 – Hyphema (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.0 – Hyphema
What it is
Hyphema is blood in the anterior chamber of the eye, usually after trauma. It can partially or completely obscure the iris and pupil.
Clinical signs
Typical findings include visible blood layering in the front of the eye, blurred vision, eye pain, and light sensitivity. Clinical features vary; refer to documentation.
When to use this code
Use H21.0 when the record clearly documents hyphema, including traumatic or spontaneous blood in the anterior chamber. You may also use it when the provider identifies hyphema as the diagnosis for the encounter. Check documentation if the note only mentions ocular bleeding without specifying location.
Do not use for
Do not use this code for blood in other parts of the eye, such as vitreous hemorrhage or subconjunctival hemorrhage. Check documentation if the eye injury is described without confirmed anterior chamber bleeding.
Coding tip
Code the documented eye finding, and verify laterality or associated injury details elsewhere in the record.