Furuncle of unspecified foot

This code signifies a localized, painful bacterial infection of a hair follicle on the foot, commonly known as a boil. It presents as a red, tender nodule that may develop a pustular head and is caused by Staphylococcus aureus bacteria. The "unspecified" nature indicates the exact location on the foot is not documented.

Use this code when documentation clearly identifies a furuncle (boil) located on the foot, but the specific anatomical site (e.g., dorsal, plantar, toe) is not specified. This code is appropriate for initial encounters, follow-up visits, or when the furuncle is the primary reason for the encounter.

• Avoid using this code if a more specific anatomical site on the foot is documented (e.g., toe, heel); look for codes with greater specificity.
• Do not confuse a furuncle with a carbuncle, which is a deeper, interconnected cluster of furuncles.
• Consider an additional code for the causative organism (e.g., B95.61 for MRSA) if documented.