Carbuncle of left foot

This code signifies a deep, painful skin infection characterized by a cluster of interconnected boils (furuncles) that form a single, inflamed mass. It specifically indicates this infection is located on the left foot. The infection typically involves hair follicles and extends into the subcutaneous tissue.

Apply this code when documentation clearly states a carbuncle is present on the patient's left foot. This diagnosis is often supported by physical examination findings of a swollen, erythematous, and tender lesion with multiple draining heads, along with patient complaints of localized pain and fever.

• Ensure the documentation specifies "carbuncle" and not just a "furuncle" or "abscess" to avoid miscoding.
• Verify the laterality is explicitly stated as "left foot"; otherwise, an unspecified laterality code may be more appropriate.
• Consider co-reporting with codes for any associated systemic symptoms, such as fever (R50.9), if documented.