ICD-10 Code H16.423 – Pannus (corneal), bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.423 – Pannus (corneal), bilateral
What it is
H16.423 identifies pannus affecting both corneas. This means abnormal superficial tissue grows over the corneal surface, often leading to haze or vascularized corneal change.
Clinical signs
Common findings include corneal opacity, superficial blood vessels extending onto the cornea, and reduced corneal clarity. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents bilateral corneal pannus or bilateral corneal vascularization consistent with pannus. It may appear as a chronic corneal surface change on eye examination. Code only when the bilateral condition is clearly documented.
Do not use for
Do not use it for unilateral pannus or for other corneal scars without pannus documentation. Check documentation if the record only states corneal opacity or vascularization.
Coding tip
Verify laterality in the note; this code is specific to bilateral disease.