Cellulitis of left external ear

This code signifies an acute bacterial infection of the dermis and subcutaneous tissue affecting the outer portion of the left ear. It presents with localized erythema, warmth, swelling, and tenderness, often without a well-defined border. This condition can arise from minor trauma, insect bites, or spread from adjacent infections.

Apply this code when documentation clearly indicates cellulitis specifically affecting the left external ear. Supporting documentation should include a physical exam noting the characteristic signs of infection on the left auricle or pinna, and may mention a precipitating factor. Distinguish from otitis externa, which primarily affects the ear canal.

• Ensure the laterality (left) is explicitly documented; do not assume.
• Differentiate from other ear infections like otitis externa (H60.3-) or perichondritis (H61.0-), which have distinct anatomical locations.
• If an underlying cause (e.g., insect bite, wound) is identified, code it as a secondary diagnosis.