ICD-10 Code H18.06 – Stromal corneal pigmentations (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.06 – Stromal corneal pigmentations
What it is
H18.06 identifies pigment deposits within the corneal stroma, the supportive middle layer of the cornea. Use it when documentation specifically describes stromal corneal pigmentation.
Clinical signs
Findings may include visible corneal discoloration or pigmented spots on slit-lamp exam. Clinical features vary; refer to documentation.
When to use this code
Use this code when the clinician documents stromal corneal pigmentations as the diagnosis or a confirmed exam finding. It fits cases where the pigmentation is the condition being addressed, not a nonspecific corneal opacity. If the note names another corneal disorder as the primary diagnosis, code that condition instead.
Do not use for
Do not use H18.06 for pigmentation limited to another eye structure or for unspecified corneal discoloration without stromal involvement. Check documentation.
Coding tip
Confirm the note says “stromal” or clearly places the pigment within the corneal stroma before assigning H18.06.