Diffuse cholesteatosis, bilateral

This code signifies a widespread, non-cancerous growth of skin cells (cholesteatoma) within the middle ear and/or mastoid bone, affecting both ears. This condition can lead to bone erosion, hearing loss, and other complications if left untreated. It is characterized by the accumulation of keratin debris forming a cyst-like structure.

Apply this code when documentation explicitly states "diffuse cholesteatosis" affecting both the left and right ears. This diagnosis is typically made based on otoscopic examination, imaging studies (CT scan), and clinical symptoms such as otorrhea, hearing loss, and ear pain.

• Ensure documentation specifies "diffuse" and "bilateral" to support this specific code.
• Distinguish from localized cholesteatoma (H71.1-) or cholesteatoma of the attic (H71.2-).
• Code any associated complications, such as conductive hearing loss (H90.0-), mastoiditis (H70.-), or facial nerve disorder (G51.-), as secondary diagnoses.