ICD-10 Code H18.791 – Other corneal deformities, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.791 – Other corneal deformities, right eye
What it is
This code identifies a deformity or abnormal shape of the cornea in the right eye that is not classified elsewhere. Use it when the record describes a corneal contour problem without a more specific diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Findings may include irregular corneal shape noted on exam or imaging, with associated visual distortion or reduced clarity if documented.
When to use this code
Use H18.791 when the provider documents an unspecified or other corneal deformity affecting the right eye and no more specific corneal disorder is stated. It may apply after ophthalmic examination, corneal topography, or specialist assessment. Code the documented laterality exactly as recorded.
Do not use for
Do not use this code for corneal disease with a specific ICD-10-CM diagnosis, such as keratoconus or corneal scar, if documented. Check documentation if the deformity is in another eye or not clearly described.
Coding tip
Confirm laterality and the exact corneal diagnosis before assigning H18.791.