ICD-10 Code H18.053 – Posterior corneal pigmentations, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.053 – Posterior corneal pigmentations, bilateral
What it is
This code identifies pigment deposits on the posterior surface of both corneas. Use it when the record specifically documents bilateral posterior corneal pigmentation, not a broader corneal disorder.
Clinical signs
Findings may include visible pigment on corneal examination, often noted at the posterior cornea. Clinical features vary; refer to documentation for laterality and whether the pigmentation is incidental or associated with another eye condition.
When to use this code
Use H18.053 when the provider documents posterior corneal pigmentations in both eyes. It is appropriate for ophthalmology notes, exam findings, or problem lists that clearly name the bilateral condition. If the note describes only one eye or another corneal abnormality, code that documented diagnosis instead.
Do not use for
Do not use this code for nonspecific corneal discoloration, anterior corneal pigment, or unilateral posterior corneal pigmentation. Check documentation if the record mentions a different corneal lesion or an underlying disorder.
Coding tip
Verify both the location and laterality in the ophthalmology note before assigning H18.053.