Cellulitis of external ear, bilateral

This code signifies an acute bacterial infection of the dermis and subcutaneous tissue affecting both external ears. It presents with erythema, warmth, swelling, and tenderness, often without a well-defined border. This condition typically arises from a break in the skin, allowing entry of pathogens.

Apply this code when documentation clearly indicates cellulitis affecting both the left and right external ear. This diagnosis is supported by physical exam findings consistent with infection and a physician's explicit statement of "bilateral external ear cellulitis." Ensure the laterality is precisely documented.

• Differentiate from otitis externa, which is an inflammation of the ear canal, not the external ear tissue.
• Confirm documentation specifies "bilateral" involvement; otherwise, a unilateral code should be selected.
• Sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if it's a co-morbidity.