ICD-10 Code H18.813 – Anesthesia and Hypoesthesia of Cornea, Bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.813 – Anesthesia and hypoesthesia of cornea, bilateral
What it is
H18.813 identifies reduced or absent corneal sensation in both eyes. It means the cornea is less responsive to touch, which can affect protective blinking and eye surface awareness.
Clinical signs
Clinical features vary; refer to documentation. Findings may include diminished corneal reflex, reduced sensation on exam, and symptoms that do not match the degree of ocular surface irritation.
When to use this code
Use this code when the provider documents bilateral corneal anesthesia or hypoesthesia. It may apply after neurologic disease, corneal injury, surgery, or other documented causes affecting corneal innervation. Code only when both eyes are specified.
Do not use for
Do not use it for unilateral corneal sensory loss or for general dry eye without documented corneal sensory reduction. Check documentation if the record only mentions corneal disease, pain, or numbness without bilateral involvement.
Coding tip
Verify that the note clearly states bilateral corneal sensory loss before assigning H18.813.