ICD-10 Code H18.46 – Peripheral corneal degeneration (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.46 – Peripheral corneal degeneration
What it is
This code identifies degeneration affecting the peripheral cornea, the outer edge of the clear front part of the eye. Use it when documentation specifically describes peripheral corneal degeneration.
Clinical signs
Findings may include peripheral corneal thinning, opacity, or structural change seen on eye examination. Clinical features vary; refer to documentation.
When to use this code
Use H18.46 when the provider documents peripheral corneal degeneration as the diagnosis, whether found on routine exam or during evaluation for visual complaints. It also fits when the record describes a degenerative peripheral corneal disorder without a more specific named condition.
Do not use for
Do not use this code for corneal infection, injury, or ulceration. If the chart names a different corneal dystrophy or degeneration, check documentation and code the documented condition instead.
Coding tip
Confirm the note specifies “peripheral” corneal degeneration; if the location is unclear, query the provider.