ICD-10 Code H18.413 – Arcus senilis, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.413 – Arcus senilis, bilateral
What it is
Arcus senilis is a gray-white ring or arc at the edge of both corneas. It reflects lipid deposition in the peripheral cornea and is usually an incidental eye finding.
Clinical signs
You may see a bilateral, peripheral corneal ring separated from the limbus by a clear zone. Clinical features vary; refer to documentation.
When to use this code
Use H18.413 when the provider documents bilateral arcus senilis, arcus senilis in both eyes, or a similar confirmed corneal finding. This code fits routine examination notes when the finding is recorded without another primary corneal disorder. Check documentation if the note mentions a different corneal ring or unilateral involvement.
Do not use for
Do not use this code for unilateral arcus senilis or for corneal opacity from another cause. If the documentation is unclear, check documentation.
Coding tip
Code only when the record clearly states bilateral involvement; otherwise, verify laterality before assigning H18.413.