ICD-10 Code H16.402 – Unspecified corneal neovascularization, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.402 – Unspecified corneal neovascularization, left eye
What it is
H16.402 identifies abnormal new blood vessel growth in the cornea of the left eye when the cause or type is not further specified. Use it when documentation clearly states corneal neovascularization but does not name a more specific diagnosis.
Clinical signs
Clinical features may include visible vessels extending into the normally avascular cornea, corneal haze, or reduced transparency. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents unspecified corneal neovascularization limited to the left eye. It is appropriate when laterality is clear but the underlying cause, extent, or subtype is not described. Check documentation if the note mentions a more specific corneal disorder.
Do not use for
Do not use this code for neovascularization in the right eye, both eyes, or when a different corneal condition is named. If the record specifies a more detailed diagnosis, code that condition instead.
Coding tip
Verify both laterality and the word “unspecified” before assigning H16.402.