ICD-10 Code H34.812 – Central retinal vein occlusion, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H34.812 – Central retinal vein occlusion, left eye
What it is
H34.812 identifies a blockage of the central retinal vein in the left eye. This code is used when the record specifies the left eye and the diagnosis is central retinal vein occlusion.
Clinical signs
Typical findings include sudden, painless vision loss or blurring in the affected eye. Funduscopic exam may show retinal hemorrhages, venous dilation, and optic disc swelling; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents central retinal vein occlusion limited to the left eye. It also fits follow-up visits, specialty evaluations, or problem-list entries when the diagnosis remains active. If laterality is not stated, check documentation before coding.
Do not use for
Do not use H34.812 for retinal artery occlusion, branch retinal vein occlusion, or unspecified-eye retinal vein occlusion. If the note does not clearly identify the left eye, do not assume this code.
Coding tip
Match laterality exactly as documented; if the eye is unclear, query the provider before assigning H34.812.