Double pterygium of eye, bilateral

This code describes the presence of a double pterygium affecting both eyes. A pterygium is a triangular growth of conjunctival tissue that extends onto the cornea, and "double" indicates two distinct pterygia are present on the same eye, typically one nasally and one temporally. This bilateral involvement signifies the condition affects both the right and left eyes.

Use this code when documentation clearly states the presence of a double pterygium in both eyes. This typically occurs in patients presenting with chronic ocular irritation, vision changes due to corneal encroachment, or cosmetic concerns. The diagnosis should be confirmed by an ophthalmologist during an eye examination.

• Ensure documentation specifies "double" pterygium and "bilateral" involvement; otherwise, a different code may be more appropriate.
• Do not confuse with single pterygium (H11.01-) or pseudopterygium.
• If laterality is not specified but the condition is clearly bilateral, query the provider for clarification.