ICD-10 Code H18.462 – Peripheral corneal degeneration, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.462 – Peripheral corneal degeneration, left eye
What it is
This code identifies a degenerative change affecting the peripheral cornea of the left eye. It is used when documentation specifies the left eye and the condition is not better described by another corneal disorder.
Clinical signs
Clinical features vary; refer to documentation. Findings may include peripheral corneal thinning, opacity, or other degenerative changes noted on eye examination.
When to use this code
Use H18.462 when the provider documents peripheral corneal degeneration in the left eye, including cases identified during slit-lamp examination or ophthalmology follow-up. Code it when the record clearly links the degeneration to the left eye and no more specific diagnosis is recorded.
Do not use for
Do not use this code for corneal ulcers, acute inflammation, or traumatic corneal injury. If the chart does not specify the left eye or the diagnosis is unclear, check documentation.
Coding tip
Confirm laterality in the note before assigning H18.462.