ICD-10 Code H18.052 – Posterior corneal pigmentations, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.052 – Posterior corneal pigmentations, left eye
What it is
This code identifies pigment deposits on the posterior surface of the cornea in the left eye. It is used when documentation specifically names posterior corneal pigmentation, not a broader corneal disorder.
Clinical signs
Findings may include visible pigment on slit-lamp examination and corneal discoloration noted by the eye specialist. Clinical features vary; refer to documentation.
When to use this code
Use H18.052 when the provider documents posterior corneal pigmentations limited to the left eye. Code it when the record distinguishes the laterality and does not describe the finding as part of another coded condition.
If the note only says “corneal pigmentation” without location or eye, check documentation before assigning this code. Make sure the chart supports the left-eye specificity.
Do not use for
Do not use this code for pigment changes in the right eye, both eyes, or unspecified eye. Do not use it when the pigmentation is documented as part of another primary corneal diagnosis unless instructed otherwise.
Coding tip
Always verify laterality in the ophthalmology note before coding H18.052.