ICD-10 Code H34.833 – Tributary (branch) retinal vein occlusion, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H34.833 – Tributary (branch) retinal vein occlusion, bilateral
What it is
H34.833 identifies blockage of branch retinal veins in both eyes. This code applies when venous obstruction affects tributary retinal vessels bilaterally, causing impaired retinal blood flow.
Clinical signs
Typical findings include sudden or subacute vision loss, blurred vision, or visual field defects in one or both eyes. Fundus examination may show retinal hemorrhages, venous dilation, or retinal edema; clinical features vary, refer to documentation.
When to use this code
Use this code when the provider documents bilateral branch retinal vein occlusion, including tributary vein occlusion in both eyes. It is appropriate for confirmed ophthalmic diagnoses supported by exam or imaging findings. If laterality is not clearly bilateral, check documentation before coding.
Do not use for
Do not use H34.833 for central retinal vein occlusion, unilateral branch vein occlusion, or retinal artery occlusion. If the record only says “retinal vein occlusion” without bilateral branch involvement, check documentation.
Coding tip
Confirm both laterality and vessel type in the ophthalmology note before assigning H34.833.