Pannus (corneal), bilateral

This code describes the presence of pannus affecting both corneas. Corneal pannus is a vascularized fibrous tissue that grows over the cornea, often associated with chronic inflammation or irritation. It can impair vision by obstructing the visual axis.

Use this code when the medical record clearly documents the presence of corneal pannus in both eyes. This diagnosis is typically made during an ophthalmologic examination, noting the characteristic vascularization and tissue growth on the cornea.

• Ensure documentation specifies "bilateral" involvement; otherwise, use the appropriate unilateral code.
• Look for underlying causes of pannus, such as trachoma or chronic conjunctivitis, and code them additionally if documented.
• Distinguish from other corneal opacities or degenerations that do not involve vascularization.