ICD-10 Code H34.03 – Transient retinal artery occlusion, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H34.03 – Transient retinal artery occlusion, bilateral
What it is
H34.03 identifies a temporary blockage of blood flow in both retinal arteries. This code describes a bilateral retinal ischemic event that resolves, rather than a permanent artery occlusion.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include sudden, painless, transient visual loss or dimming in both eyes, with evidence supporting retinal arterial ischemia.
When to use this code
Use this code when the provider documents transient retinal artery occlusion affecting both eyes. It is appropriate for episodes described as temporary, resolved, or reversible retinal arterial blockage. Check documentation if the record only notes visual symptoms without confirming bilateral retinal artery involvement.
Do not use for
Do not use this code for permanent retinal artery occlusion, unilateral disease, or nonspecific visual disturbance. If the chart does not clearly confirm bilateral transient retinal artery occlusion, check documentation.
Coding tip
Verify that the note specifies both laterality and the transient nature of the occlusion before assigning H34.03.