ICD-10 Code H18.463 – Peripheral corneal degeneration, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.463 – Peripheral corneal degeneration, bilateral
What it is
H18.463 identifies bilateral peripheral corneal degeneration, a noninfectious corneal change affecting the outer edge of both eyes. It describes a degenerative condition, not an acute injury or infection.
Clinical signs
Clinical features vary; refer to documentation. Findings may include peripheral corneal thinning, opacity, or other degenerative changes noted on eye examination in both eyes.
When to use this code
Use this code when the provider documents peripheral corneal degeneration in both eyes. It is appropriate when the record clearly identifies bilateral involvement and does not describe a different corneal disorder.
Assign it from ophthalmology documentation, exam findings, or a confirmed diagnosis list. If the note only says “corneal degeneration” without laterality, check documentation before coding.
Do not use for
Do not use this code for corneal injury, infection, ulcer, or dystrophy unless the provider specifically documents peripheral corneal degeneration. Do not assume bilateral disease if laterality is not stated.
Coding tip
Verify both the diagnosis and laterality in the ophthalmology note before assigning H18.463.