Oth disrd of mid ear and mastoid in dis classd elswhr, bi

This code identifies bilateral conditions affecting the middle ear and mastoid that are secondary to another underlying systemic disease. These are specific, but less common, middle ear and mastoid disorders not otherwise classified by more specific ICD-10 codes.

Apply this code when documentation indicates a bilateral middle ear or mastoid disorder that is a manifestation of an underlying systemic disease, such as a metabolic, infectious, or autoimmune condition. The primary systemic disease must be coded first.

• Always sequence the underlying systemic disease first, followed by this code.
• Ensure documentation clearly specifies "bilateral" involvement and the nature of the middle ear/mastoid disorder.
• Do not use if a more specific code exists for the documented middle ear or mastoid condition.