Carbuncle, unspecified

This code represents a severe, deep-seated bacterial infection of the skin and subcutaneous tissue, characterized by a cluster of interconnected boils (furuncles). It typically involves multiple hair follicles and forms a painful, pus-filled lesion that drains through several openings. The "unspecified" nature indicates that the specific anatomical location of the carbuncle is not documented.

Use this code when the medical record clearly documents a carbuncle, but the provider has not specified its anatomical site (e.g., "carbuncle" without further detail). This code is appropriate when the physician's documentation lacks the specificity to assign a more precise anatomical code from the L02 category.

• Avoid using this code if the anatomical site of the carbuncle is documented; instead, select a more specific L02.x code.
• Query the provider for clarification on the carbuncle's location if possible to allow for more precise coding.
• Do not confuse with a single furuncle (boil), which is coded to L02.x.