Furuncle of trunk, unspecified

This code describes a localized, painful skin infection originating in a hair follicle on the torso, back, or abdomen, which has not been further specified by location. It is characterized by a central core of pus and necrotic tissue. This condition is commonly known as a boil.

Apply this code when documentation indicates a furuncle (boil) located on the trunk, and no more specific anatomical site (e.g., abdomen, back) is provided. Supporting documentation should clearly state "furuncle of trunk" or "boil on torso" without further detail.

• Avoid using this code if a more specific anatomical site on the trunk is documented (e.g., L02.211 for furuncle of abdominal wall).
• Do not confuse with carbuncle (L02.23-), which involves multiple hair follicles and forms a deeper, interconnected lesion.
• Sequence this code as a primary diagnosis when the furuncle is the reason for the encounter, or as a secondary diagnosis if it's a co-morbidity.