ICD-10 Code H34.02 – Transient retinal artery occlusion, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H34.02 – Transient retinal artery occlusion, left eye
What it is
H34.02 identifies a temporary blockage of blood flow in the retinal artery of the left eye. The vision loss or visual disturbance is usually brief and may resolve spontaneously.
Clinical signs
Typical findings include sudden, painless monocular visual loss or transient dimming in the left eye. Clinical features vary; refer to documentation.
When to use this code
Use H34.02 when the record documents a transient retinal artery occlusion affecting the left eye specifically. It fits cases described as temporary retinal ischemia, transient monocular vision loss, or a resolved retinal arterial blockage, when laterality is clearly stated.
Do not use for
Do not use this code for permanent retinal artery occlusion, retinal vein occlusion, or visual symptoms without documented arterial occlusion. Check documentation if the eye or transient nature is not confirmed.
Coding tip
Verify both laterality and that the occlusion was transient before assigning H34.02.