ICD-10 Code H34.00 – Transient Retinal Artery Occlusion, Unspecified Eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H34.00 – Transient retinal artery occlusion, unspecified eye
What it is
This code identifies a temporary blockage of blood flow in a retinal artery, affecting the eye but not causing a permanent occlusion. It is used when the affected eye is not specified.
Clinical signs
Patients may report sudden, painless, transient vision loss or dimming in one eye. Clinical features vary; refer to documentation, and confirm whether the episode resolved and which eye was involved.
When to use this code
Use H34.00 when the record documents a transient retinal artery occlusion and does not identify the right or left eye. Apply it for brief ischemic retinal events described as temporary or resolved. If the note specifies a different retinal vascular disorder, code that condition instead.
Do not use for
Do not use this code for permanent retinal artery occlusion or for retinal vein occlusion. Check documentation if the diagnosis is amaurosis fugax without clear retinal artery involvement.
Coding tip
Verify laterality and whether the event was transient before assigning H34.00.