ICD-10 Code H18.461 – Peripheral corneal degeneration, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.461 – Peripheral corneal degeneration, right eye
What it is
This code identifies degenerative change in the peripheral cornea of the right eye. It indicates a localized corneal disorder, not a generalized eye disease.
Clinical signs
Findings may include peripheral corneal thinning, opacity, or structural change on slit-lamp exam. Clinical features vary; refer to documentation.
When to use this code
Use H18.461 when the provider documents peripheral corneal degeneration affecting the right eye. It is appropriate when the record clearly specifies the right eye and the condition is not described as another corneal disorder.
If the note only says “corneal degeneration” without laterality, check documentation before coding. You should also confirm that the finding is degenerative rather than inflammatory, traumatic, or infectious.
Do not use for
Do not use this code for corneal ulcer, keratitis, dystrophy, or injury-related corneal changes. Check documentation if the diagnosis is nonspecific or the laterality is not stated.
Coding tip
Always match the documented eye and corneal diagnosis exactly; laterality errors are common.