ICD-10 Code H18.10 – Bullous keratopathy, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.10 – Bullous keratopathy, unspecified eye
What it is
H18.10 identifies bullous keratopathy in an unspecified eye. It means the cornea has edema with blister-like epithelial bullae, but the affected eye is not documented.
Clinical signs
Typical findings include corneal clouding, pain, tearing, photophobia, and reduced vision. Clinical features vary; refer to documentation for the affected eye and any associated corneal edema.
When to use this code
Use H18.10 when the provider documents bullous keratopathy but does not specify right or left eye. It also fits cases where the record confirms corneal bullae or edema without laterality. If the note names a specific eye, use the corresponding laterality code instead.
Do not use for
Do not assign this code for corneal edema without bullous keratopathy, or for a documented right or left eye when laterality is available. Check documentation if the diagnosis is uncertain.
Coding tip
Verify laterality in the ophthalmology note before selecting the unspecified-eye code.