ICD-10 Code H16.422 – Pannus (corneal), left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.422 – Pannus (corneal), left eye
What it is
This code identifies corneal pannus in the left eye, meaning abnormal superficial blood vessels and tissue have grown over the cornea. It is a location-specific diagnosis for the left eye.
Clinical signs
Typical findings include superficial corneal vascularization, haze, and reduced corneal clarity. Clinical features vary; refer to documentation.
When to use this code
Use H16.422 when the provider documents pannus affecting only the left cornea. It may appear in chronic inflammatory or irritative eye conditions, but you should code the documented diagnosis, not the cause unless separately reported.
Do not use for
Do not use this code for pannus in the right eye, bilateral pannus, or nonspecific corneal opacity. Check documentation if the record only mentions corneal vascularization without specifying pannus.
Coding tip
Confirm laterality in the ophthalmology note before assigning H16.422.