ICD-10 Code H11.41 – Vascular abnormalities of conjunctiva (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.41 – Vascular abnormalities of conjunctiva
What it is
H11.41 identifies abnormal blood vessel changes involving the conjunctiva, the thin membrane covering the white of the eye and inner eyelids. Use it when the record documents a vascular conjunctival lesion or abnormal vascularity.
Clinical signs
Findings may include visible conjunctival vessel enlargement, tortuous vessels, or a localized vascular lesion on exam. Clinical features vary; refer to documentation.
When to use this code
Use this code when the clinician specifically documents vascular abnormalities of the conjunctiva, such as an abnormal vascular lesion or vascular malformation affecting that tissue. It is appropriate when the diagnosis is confirmed in the chart and no more specific code is given.
If the note describes only redness, irritation, or conjunctivitis without a vascular abnormality, this code is usually not supported. Check documentation for the exact anatomic site and diagnosis wording.
Do not use for
Do not use H11.41 for general eye redness, conjunctivitis, or nonspecific irritation. Check documentation if the finding is actually a lesion of another ocular structure.
Coding tip
Code only when the provider documents a true conjunctival vascular abnormality, not just a symptom or appearance.