Carbuncle and furuncle of unspecified site

This code represents an acute, localized bacterial infection of the skin and subcutaneous tissue, specifically a carbuncle (a cluster of interconnected furuncles) or a furuncle (a boil), when the anatomical location of the lesion is not documented. These infections typically involve hair follicles and are characterized by inflammation, pus formation, and necrosis.

Use this code when the medical record clearly indicates a diagnosis of a carbuncle or furuncle, but the specific body site (e.g., face, neck, trunk, extremity) is not specified by the provider. This code is appropriate when the documentation lacks the detail necessary to assign a more specific anatomical site code.

• Avoid using this code if a more specific anatomical site is documented; always strive for the highest level of specificity.
• Review the entire medical record, including operative reports or progress notes, for any mention of the lesion's location before resorting to an unspecified code.
• Query the provider if the site is unclear and a more specific code is needed for accurate reporting.