ICD-10 Code H18.423 – Band keratopathy, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.423 – Band keratopathy, bilateral
What it is
H18.423 identifies band keratopathy affecting both eyes. It means calcium deposits have formed in the cornea in a horizontal, band-like pattern.
Clinical signs
Typical findings include visible corneal opacity or a gray-white band across the interpalpebral zone. Patients may report blurred vision, irritation, foreign-body sensation, or reduced visual clarity. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents band keratopathy in both eyes. It is appropriate for ophthalmology visits, consults, or problem lists when bilateral corneal calcium deposition is confirmed. If laterality is not stated, check documentation before coding.
Do not use for
Do not use H18.423 for unilateral band keratopathy or for nonspecific corneal opacity without documentation of calcium deposition. If the note only says “corneal degeneration” or “corneal scar,” check documentation.
Coding tip
Confirm bilateral involvement in the assessment or impression, because laterality drives the code selection.