ICD-10 Code H18.05 – Posterior corneal pigmentations (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.05 – Posterior corneal pigmentations
What it is
This code identifies pigment deposits on the posterior corneal surface. Use it when documentation specifically describes posterior corneal pigmentation rather than a broader corneal disorder.
Clinical signs
Findings may include visible posterior corneal pigment on examination, often noted at the back of the cornea. Clinical features vary; refer to documentation.
When to use this code
Use H18.05 when the provider documents posterior corneal pigmentations as the diagnosis or a confirmed exam finding. It may apply during ophthalmology evaluations, follow-up visits, or workups where the pigment is the primary recorded corneal abnormality.
Do not use for
Do not use this code for pigment on other eye structures, such as the iris or lens. Do not assign it when the record only mentions corneal opacity, staining, or an unspecified corneal lesion.
Coding tip
Code only when the note clearly identifies posterior corneal pigmentation; otherwise, check documentation.