ICD-10 Code H18.42 – Band keratopathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.42 – Band keratopathy
What it is
H18.42 identifies band keratopathy, a corneal condition with calcium deposition in the superficial cornea. It is coded when documentation specifies this diagnosis.
Clinical signs
Typical findings include a gray-white, band-like opacity across the cornea, usually in the interpalpebral area. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents band keratopathy as the confirmed diagnosis. It may appear on ophthalmology exams, consults, or problem lists when corneal calcification is the stated reason for care. If the note only describes corneal opacity without naming band keratopathy, check documentation.
Do not use for
Do not use it for other corneal scars, dystrophies, or nonspecific eye findings unless band keratopathy is explicitly documented. Check documentation.
Coding tip
Code H18.42 only when the chart clearly names band keratopathy, not merely “corneal opacity” or “calcium deposits.”