Cholesteatoma of left external ear

This code signifies the presence of a cholesteatoma, a destructive and expanding growth of squamous epithelium, specifically located within the external auditory canal of the left ear. This lesion can erode bone and soft tissue, potentially leading to complications such as infection or hearing loss.

Apply this code when documentation clearly indicates a cholesteatoma affecting the external ear canal on the patient's left side. This typically arises from congenital causes or chronic inflammation. Supporting documentation includes physician notes detailing the location, size, and any associated symptoms or findings from otoscopic examination.

• Differentiate from middle ear cholesteatoma (H71.-) which has distinct anatomical implications.
• Ensure laterality is explicitly documented; if unspecified, query the provider.
• Code any associated complications, such as conductive hearing loss (H90.02), separately.