Furuncle of limb, unspecified

This code describes a localized, painful skin infection (abscess) originating in a hair follicle, specifically located on an unspecified limb. It indicates an inflammatory nodule with a necrotic core, commonly known as a boil, without further specification of the exact limb affected.

Use this code when documentation clearly identifies a furuncle (boil) on an extremity, but the specific limb (e.g., arm, leg, hand, foot) is not documented. This is appropriate for initial encounters or when the precise location is not yet determined or recorded.

• Avoid using this code if the specific limb is documented; instead, choose a more specific code from the L02.4- series (e.g., L02.41- for arm, L02.43- for leg).
• Ensure documentation specifies "furuncle" or "boil" rather than a general skin abscess, which would fall under L02.91.
• Do not use this code if the furuncle is on the head, neck, trunk, or buttock; refer to the appropriate L02.0-L02.3 codes.