Unspecified pterygium of eye, bilateral

This code indicates the presence of an unspecified pterygium affecting both eyes. A pterygium is a benign, wedge-shaped growth of conjunctival tissue that extends onto the cornea. "Unspecified" means the type or characteristics of the pterygium (e.g., primary, recurrent, progressive) are not documented.

Use this code when documentation confirms bilateral pterygium without further specification of its nature or laterality. This is appropriate when the physician notes "bilateral pterygium" without additional details regarding its primary or recurrent status.

• Avoid using this code if the documentation specifies whether the pterygium is primary or recurrent; instead, use the more specific codes within the H11.0- series.
• Ensure the medical record clearly indicates involvement of both eyes.
• Do not use this code if only one eye is affected; refer to H11.001 or H11.002 for unilateral cases.