ICD-10 Code H16.409 – Unspecified corneal neovascularization, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.409 – Unspecified corneal neovascularization, unspecified eye
What it is
This code identifies abnormal growth of blood vessels into the cornea when the affected eye is not specified. It is used when the record confirms corneal neovascularization but does not document laterality or a more specific cause.
Clinical signs
Findings may include visible corneal vessels, corneal haze, or reduced transparency. Clinical features vary; refer to documentation for the exact presentation and whether the condition is active or stable.
When to use this code
Use H16.409 when the provider documents corneal neovascularization and does not state which eye is involved. It also fits when the note lacks a more specific diagnosis, cause, or laterality. Check documentation if another corneal disorder is named.
Do not use for
Do not use this code for corneal neovascularization with a documented eye laterality or a more specific corneal diagnosis. Do not assign it if the chart only mentions a history of the finding without current confirmation.
Coding tip
If laterality is missing, code the unspecified eye only when the documentation truly supports it.