ICD-10 Code H16.432 – Localized vascularization of cornea, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.432 – Localized vascularization of cornea, left eye
What it is
Use this code for abnormal blood vessel growth limited to the cornea of the left eye. It indicates a localized corneal vascular change, not a general conjunctival or eyelid disorder.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include visible vessels extending into the cornea on slit-lamp exam, sometimes with corneal opacity or scarring.
When to use this code
Use H16.432 when the provider documents localized vascularization of the cornea in the left eye. Code it when the finding is specifically identified as corneal and unilateral, and the record does not describe a different corneal disorder as the primary diagnosis.
Do not use for
Do not use this code for vascularization of the right eye, bilateral corneal vascularization, or nonspecific eye redness. Check documentation if the note describes a broader corneal disease without naming localized vascularization.
Coding tip
Confirm laterality and the word “localized” in the ophthalmology note before assigning H16.432.