ICD-10 Code H36 – Retinal disorders in diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H36 – Retinal disorders in diseases classified elsewhere
What it is
H36 identifies retinal disorders that are caused by another disease, rather than a primary eye condition. Use it when the retinal problem is documented as secondary to an underlying disorder.
Clinical signs
Clinical features vary; refer to documentation. Findings may include retinal abnormalities noted on examination or imaging, with the underlying disease linking the eye involvement to another condition.
When to use this code
Use H36 when the record clearly states the retinal disorder is due to a separate disease, such as a systemic or inherited condition. Code the underlying condition first when required by ICD-10-CM guidelines. Check documentation for the causal relationship and the specific retinal manifestation.
Do not use for
Do not use H36 for a primary retinal disease without an external cause or associated condition. Also avoid it when the documentation does not support a disease classified elsewhere relationship.
Coding tip
Verify both the cause and the retinal manifestation in the chart before assigning H36.