ICD-10 Code H18.429 – Band keratopathy, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.429 – Band keratopathy, unspecified eye
What it is
Band keratopathy is a corneal condition where calcium deposits form a band-like opacity across the front of the eye. This code applies when the record does not specify right, left, or bilateral eye.
Clinical signs
Typical findings include a visible gray-white or chalky band across the cornea, often in the interpalpebral zone. Vision may be reduced, and clinical features vary; refer to documentation.
When to use this code
Use H18.429 when the provider documents band keratopathy and does not identify which eye is affected. It also fits when the note confirms corneal calcium deposition but laterality is missing or unclear. Check documentation if another corneal disorder is described more specifically.
Do not use for
Do not use this code for other corneal opacities, scars, or dystrophies without documented band keratopathy. Do not assign it when the eye laterality is specified and a more precise code is available.
Coding tip
Query for laterality whenever the chart says band keratopathy, because unspecified coding should be a last resort.