Carbuncle of unspecified hand

This code describes a deep, painful skin infection involving a cluster of interconnected boils (furuncles) that forms a single, larger purulent lesion on an unspecified part of the hand. It is caused by bacterial infection, typically Staphylococcus aureus, and presents with inflammation, redness, and often systemic symptoms like fever and malaise.

Use this code when documentation clearly indicates a carbuncle located on the hand, but the specific digit or area (e.g., palm, dorsum) is not specified. This diagnosis is supported by physician notes describing a multi-headed, deep abscess on the hand requiring incision and drainage or antibiotic therapy.

• Do not use this code if the specific location on the hand (e.g., thumb, index finger) is documented; instead, use a more specific code from the L02.53- subcategory.
• Ensure the documentation differentiates a carbuncle from a simple furuncle (boil) or cellulitis, as these have different codes.
• Sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if it is a co-morbidity being treated.