ICD-10 Code H16.433 – Localized vascularization of cornea, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.433 – Localized vascularization of cornea, bilateral
What it is
H16.433 identifies localized blood vessel growth into both corneas. Use it when the chart documents corneal vascularization limited to the cornea and affecting both eyes.
Clinical signs
Findings may include visible corneal vessels extending from the limbus or peripheral cornea. Clinical features vary; refer to documentation for whether the vascularization is partial, dense, or associated with scarring.
When to use this code
Use this code when the provider documents bilateral localized corneal vascularization, such as on slit-lamp exam or ophthalmology assessment. It is appropriate when the condition is recorded as a corneal finding, not just conjunctival redness.
If the note specifies laterality differently, code accordingly. Check documentation when vascularization is described with another corneal disorder, because the primary diagnosis may need to be coded separately.
Do not use for
Do not use this code for conjunctival injection, generalized eye redness, or corneal neovascularization without bilateral localization. Check documentation if the record does not clearly state corneal involvement.
Coding tip
Confirm both laterality and corneal location in the provider note before assigning H16.433.