ICD-10 Code H16.43 – Localized vascularization of cornea (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.43 – Localized vascularization of cornea
What it is
H16.43 identifies localized blood vessel growth into the cornea. It describes a corneal finding rather than a disease cause, so the underlying condition should be documented separately when known.
Clinical signs
Typical findings include visible superficial vessels extending into a limited area of the cornea. Clinical features vary; refer to documentation, especially when the record notes scarring, inflammation, or prior corneal injury.
When to use this code
Use this code when the provider documents localized corneal vascularization, corneal vessels, or neovascularization limited to part of the cornea. It is appropriate when the chart identifies the corneal finding without a more specific coded diagnosis. If the note links the vascularization to another condition, code that condition as well when documented.
Do not use for
Do not use it for generalized corneal vascularization or for unrelated conjunctival vessel changes. Check documentation if the record describes a different corneal disorder or only a suspected finding.
Coding tip
Code the documented corneal finding exactly and look for the cause in the assessment, because H16.43 alone does not explain why the vessels developed.