Peripheral pterygium, progressive, bilateral

This code represents a bilateral, progressive growth of conjunctival tissue onto the cornea, originating from the peripheral aspect. This benign, wedge-shaped lesion can obstruct vision and cause irritation as it advances.

Apply this code when documentation clearly indicates a pterygium affecting both eyes that is actively growing or has shown evidence of growth over time. Physician notes should specify "bilateral" and "progressive" or describe increasing size or encroachment on the cornea.

• Ensure documentation explicitly states "progressive" and "bilateral" for accurate code assignment.
• Distinguish from non-progressive pterygium (H11.00-) or unilateral involvement.
• Code any associated complications, such as astigmatism or vision impairment, separately.