ICD-10 Code H21.00 – Hyphema, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.00 – Hyphema, unspecified eye
What it is
H21.00 identifies hyphema in an unspecified eye. Hyphema means blood is present in the anterior chamber of the eye, usually after injury or another ocular event.
Clinical signs
Typical findings include visible blood layering in the front of the eye, blurred vision, eye pain, light sensitivity, or reduced visual acuity. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record states hyphema but does not specify right or left eye. It also fits cases where the provider documents blood in the anterior chamber without laterality. Check documentation if the note mentions a traumatic cause or another more specific diagnosis.
Do not use for
Do not use H21.00 if the eye is specified, because laterality codes are more precise. Do not use it for other anterior chamber disorders or for documentation that does not clearly identify hyphema.
Coding tip
Always look for laterality and cause in the chart before defaulting to the unspecified code.