ICD-10 Code H34.9 – Unspecified retinal vascular occlusion (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H34.9 – Unspecified retinal vascular occlusion
What it is
H34.9 identifies retinal vascular occlusion when the affected retinal vessel is not further specified. Use it for retinal blood flow blockage documented without a clearer artery or vein diagnosis.
Clinical signs
Findings may include sudden painless vision loss, blurred vision, or visual field defects. Clinical features vary; refer to documentation and ophthalmology assessment for the exact vessel and laterality.
When to use this code
Use this code when the record confirms retinal vascular occlusion but does not identify branch, central, arterial, or venous involvement. It also fits when the provider documents only “retinal vascular occlusion” or similar nonspecific wording. Check documentation if laterality or vessel type is unclear.
Do not use for
Do not use H34.9 when the chart specifies a more precise retinal artery or vein occlusion code. It is also incorrect for nonretinal vascular disease or for suspected cases without confirmed occlusion.
Coding tip
Choose the most specific retinal occlusion code available; use H34.9 only when the documentation remains nonspecific.