ICD-10 Code H34 – Retinal Vascular Occlusions (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H34 – Retinal vascular occlusions
What it is
H34 identifies blockage of retinal blood vessels, including arterial or venous occlusion, that reduces blood flow to the retina. Use it when the record documents a retinal vascular occlusion without a more specific code.
Clinical signs
Typical findings include sudden, painless vision loss, blurred vision, or visual field defects. Funduscopic findings and the exact vessel involved may be noted; clinical features vary, so refer to documentation.
When to use this code
Use H34 when the provider documents retinal vascular occlusion, retinal artery occlusion, or retinal vein occlusion and no more specific subcode is available. It also fits cases described as retinal vessel blockage or thrombosis affecting the retina. Check documentation for laterality and acuity details.
Do not use for
Do not use H34 for nonretinal vascular disease, optic nerve disorders, or general cerebrovascular events. If the note specifies a different eye condition or a more detailed retinal occlusion code, code that instead.
Coding tip
Look for the exact vessel, eye, and acuity in the ophthalmology note before selecting H34.