ICD-10 Code H18.451 – Nodular corneal degeneration, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.451 – Nodular corneal degeneration, right eye
What it is
This code identifies nodular corneal degeneration affecting the right eye. It refers to a localized corneal degenerative change with nodular opacity or surface irregularity, documented as occurring in the right eye.
Clinical signs
Clinical features vary; refer to documentation. Commonly, records describe a visible corneal nodule or focal corneal opacity on the right side, sometimes with surface irregularity or reduced clarity of the cornea.
When to use this code
Use H18.451 when the provider documents nodular corneal degeneration in the right eye. Apply it for ophthalmology notes, problem lists, or encounter diagnoses that specify laterality and the degenerative corneal finding. If the record is unclear, check documentation before coding.
Do not use for
Do not use this code for corneal disease in the left eye, both eyes, or unspecified laterality. It is also not appropriate for corneal ulcers, infections, or traumatic corneal lesions unless nodular degeneration is specifically documented.
Coding tip
Always confirm that the documentation names the right eye and the degenerative nodule pattern before assigning H18.451.