ICD-10 Code H18.421 – Band keratopathy, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.421 – Band keratopathy, right eye
What it is
Band keratopathy is calcium deposition in the cornea, forming a gray-white band across the front of the eye. This code specifies the right eye only.
Clinical signs
Typical findings include a visible interpalpebral corneal band, reduced corneal clarity, and possible blurred vision or foreign-body sensation. Clinical features vary; refer to documentation.
When to use this code
Use H18.421 when the provider documents band keratopathy in the right eye. Apply it for confirmed corneal calcium deposition affecting only the right eye, whether noted on exam or in the assessment. If documentation is bilateral or unspecified, check the record before coding.
Do not use for
Do not use this code for band keratopathy of the left eye, both eyes, or unspecified eye. Do not use it when the diagnosis is only suspected or when the chart says corneal opacity without band keratopathy.
Coding tip
Verify laterality in the ophthalmology note before assigning H18.421.