Pilonidal cyst with abscess

This code represents an infected pilonidal cyst, which is a sac-like structure typically found at the top of the natal cleft (buttocks crease) containing hair and skin debris. The presence of an abscess indicates a localized collection of pus due to bacterial infection within this cyst.

Use this code when documentation clearly states a pilonidal cyst with evidence of acute infection, such as pus formation, erythema, swelling, and pain. This diagnosis is commonly made upon physical examination and may be supported by incision and drainage procedures.

• Differentiate from an uncomplicated pilonidal cyst (without abscess) or a chronic draining sinus.
• Ensure documentation specifies "abscess" to justify this more specific code.
• Consider additional codes for any associated cellulitis or sepsis, if documented.