Cellulitis of back [any part except buttock]

This code describes a bacterial skin infection characterized by inflammation, redness, warmth, and tenderness affecting the dermis and subcutaneous tissue of the back, excluding the buttocks. It typically presents as a rapidly spreading area of erythema with poorly defined borders.

Apply this code when documentation confirms a diagnosis of cellulitis located anywhere on the patient's back, such as the thoracic, lumbar, or sacral regions, but explicitly not the gluteal area. Supporting documentation should include physical exam findings consistent with cellulitis and the specific anatomical site.

• Differentiate from abscess (L02.-) or erysipelas (A46), which have distinct clinical presentations and coding.
• Ensure the documentation specifies "back" and not a more generalized or unspecified body area.
• If an underlying cause (e.g., wound, insect bite) is identified, code it as a secondary diagnosis.