ICD-10 Code H18.419 – Arcus senilis, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.419 – Arcus senilis, unspecified eye
What it is
Arcus senilis is a gray-white ring or arc at the corneal margin. This code identifies the finding when the affected eye is not specified in the record.
Clinical signs
You may see a peripheral corneal opacity with a clear zone between the ring and the iris. Clinical features vary; refer to documentation.
When to use this code
Use H18.419 when the provider documents arcus senilis but does not identify the right or left eye. It also fits when the note states an unspecified eye or when laterality cannot be confirmed from the record.
Code the documented finding as written and do not infer laterality from context alone. If the chart identifies a specific eye, choose the more precise laterality code instead.
Do not use for
Do not use this code for corneal arcus in a specified eye when laterality is documented. Check documentation if the finding is actually another corneal opacity or a different eye disorder.
Coding tip
Confirm whether the provider documented right, left, or unspecified eye before assigning H18.419.