ICD-10 Code H17 – Corneal scars and opacities (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H17 – Corneal scars and opacities
What it is
H17 identifies scarring or clouding of the cornea, the clear front surface of the eye. It is used when documentation shows a corneal opacity or scar affecting vision or exam findings.
Clinical signs
Findings may include visible corneal haze, white or gray opacity, or a healed corneal scar on slit-lamp exam. Clinical features vary; refer to documentation.
When to use this code
Use H17 when the provider documents a corneal scar or opacity as the diagnosis, whether from prior injury, infection, or another healed corneal process. Code it when the record describes a residual corneal opacity rather than an active corneal disease. If laterality or a more specific subcode is documented, report the most specific available code.
Do not use for
Do not use this code for active corneal ulcer, keratitis, or other ongoing inflammatory eye disorders. Check documentation if the note describes a different corneal condition or a transient finding.
Coding tip
Look for whether the opacity is a residual scar versus an active corneal disorder before assigning H17.