ICD-10 Code H34.23 – Retinal artery branch occlusion (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H34.23 – Retinal artery branch occlusion
What it is
H34.23 identifies blockage of a branch retinal artery, which reduces blood flow to part of the retina. This code describes a localized retinal arterial occlusion, not a full central artery blockage.
Clinical signs
Typical findings include sudden, painless, sectoral vision loss or a corresponding visual field defect. Fundus exam may show retinal whitening in the affected area; clinical features vary, refer to documentation.
When to use this code
Use H34.23 when the provider documents branch retinal artery occlusion or branch retinal arterial blockage. Apply it for confirmed cases affecting one retinal branch, including acute presentations documented by ophthalmology or emergency care. Check documentation if the record only states retinal ischemia or vision loss.
Do not use for
Do not use this code for central retinal artery occlusion, retinal vein occlusion, or nonspecific visual disturbance. If the chart does not clearly identify a branch retinal artery occlusion, check documentation.
Coding tip
Code only when the record names the branch retinal artery as the site of occlusion; otherwise, query for specificity.