Unspecified otosclerosis, left ear

This code signifies an unspecified hardening of the bone in the inner ear, specifically affecting the left ear, which can lead to progressive hearing loss. It indicates the presence of otosclerosis without further specification of its type or stage.

This code is appropriate when the physician's documentation confirms a diagnosis of otosclerosis in the left ear, but the specific type (e.g., otosclerosis involving the oval window, cochlear otosclerosis) is not documented or is unknown. It is used when the laterality is clearly specified as left, but the precise anatomical involvement is not.

• Avoid using this code if the documentation specifies the type of otosclerosis (e.g., H80.02, H80.12, H80.22).
• Ensure the medical record clearly indicates the left ear as the affected side.
• Query the provider for more specific documentation regarding the type of otosclerosis if available, to allow for more precise coding.