ICD-10 Code H34.839 – Tributary (branch) retinal vein occlusion, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H34.839 – Tributary (branch) retinal vein occlusion, unspecified eye
What it is
This code identifies a blockage in a branch retinal vein, which drains blood from part of the retina. “Unspecified eye” means the record does not state whether the right or left eye is affected.
Clinical signs
Common findings include sudden, painless visual loss or blurring in one eye. You may also see retinal hemorrhages, venous dilation, and macular edema on eye examination; clinical features vary, refer to documentation.
When to use this code
Use H34.839 when the provider documents tributary or branch retinal vein occlusion and does not identify the eye. It also fits follow-up visits when the diagnosis remains active and the affected side is still not specified.
Do not assume laterality from imaging, symptoms, or prior history unless the chart clearly states it. If the note names the right or left eye, choose the laterality-specific code instead.
Do not use for
Do not use this code for central retinal vein occlusion, retinal artery occlusion, or other retinal vascular disorders. Check documentation if the record specifies a different eye or a more precise diagnosis.
Coding tip
Look for laterality in the assessment, not just the exam findings, before assigning H34.839.