ICD-10 Code H18.01 – Anterior corneal pigmentations (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.01 – Anterior corneal pigmentations
What it is
This code identifies pigment deposits on the front surface layers of the cornea. Use it when the record describes anterior corneal pigmentation without a more specific corneal disorder.
Clinical signs
Findings may include visible corneal pigment on slit-lamp exam and a documented anterior corneal opacity or discoloration. Clinical features vary; refer to documentation.
When to use this code
Use H18.01 when the clinician documents anterior corneal pigmentations as the diagnosis or exam finding. It may also fit when the chart notes corneal pigmentation affecting the anterior cornea and no more specific code is available.
Do not use for
Do not use this code for pigmentation limited to the conjunctiva, iris, or eyelid. Avoid it when the record describes a different corneal lesion or a more specific corneal diagnosis.
Coding tip
Check the ophthalmology note for exact corneal location and laterality details before assigning the code.