ICD-10 Code H18.45 – Nodular corneal degeneration (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.45 – Nodular corneal degeneration
What it is
Nodular corneal degeneration is a corneal disorder marked by localized nodular changes in the cornea. It reflects a degenerative process rather than an acute infection or injury.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include visible corneal nodules or opacity on eye examination, with associated surface irregularity or visual disturbance.
When to use this code
Use H18.45 when the provider documents nodular corneal degeneration as the diagnosis. It is appropriate for ophthalmology notes, problem lists, or encounter assessments that specifically name this corneal degeneration. Check documentation if the record only describes nonspecific corneal opacity or degeneration.
Do not use for
Do not use this code for corneal ulcer, keratitis, trauma, or other clearly different corneal diseases. If the diagnosis is uncertain or not stated, check documentation rather than assuming nodular degeneration.
Coding tip
Assign H18.45 only when the clinician explicitly identifies nodular corneal degeneration.