ICD-10 Code H11.413 – Vascular abnormalities of conjunctiva, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.413 – Vascular abnormalities of conjunctiva, bilateral
What it is
This code identifies abnormal blood vessel changes in the conjunctiva of both eyes. It is used when the record describes bilateral conjunctival vascular abnormalities without a more specific diagnosis.
Clinical signs
Findings may include visibly dilated, tortuous, or otherwise abnormal conjunctival vessels on both sides. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents bilateral vascular abnormalities of the conjunctiva as the diagnosis. It may fit ophthalmology notes describing abnormal conjunctival vessels, vascular congestion, or similar bilateral findings when no more specific condition is stated. Check documentation if the cause is unclear.
Do not use for
Do not use this code for unilateral conjunctival vascular changes or for general eye redness without documented vascular abnormality. Do not assign it when a different conjunctival disorder better explains the finding.
Coding tip
Confirm that both eyes are involved and that the note specifically supports a vascular conjunctival abnormality before assigning H11.413.