ICD-10 Code H34.821 – Venous engorgement, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H34.821 – Venous engorgement, right eye
What it is
This code identifies venous engorgement limited to the right eye. It indicates abnormal dilation or congestion of the ocular veins, as documented by the clinician.
Clinical signs
Findings may include visibly enlarged or congested retinal or ocular veins on eye examination. Clinical features vary; refer to documentation.
When to use this code
Use H34.821 when the provider specifically documents venous engorgement in the right eye. It is appropriate when the condition is localized to that eye and no broader diagnosis better explains the finding. Check documentation if the record only mentions vascular congestion without laterality.
Do not use for
Do not use this code for left-eye or bilateral findings, or for nonspecific eye redness without venous involvement. Avoid it when the record documents a different retinal vascular disorder.
Coding tip
Confirm laterality in the ophthalmology note before assigning H34.821.