Pilonidal cyst and sinus (L05)

This group of ICD-10 codes under L05 is specifically used to identify and classify medical conditions related to pilonidal cysts and sinuses, which are skin infections occurring near the natal cleft (the crease between the buttocks). These codes distinguish between cases with and without abscess formation.

The ICD-10 code for pilonidal cyst and sinus includes detailed options such as L05.0 for pilonidal cyst and sinus with abscess, and further subdivisions like L05.01 and L05.02 that specify whether the abscess involves a cyst or a sinus specifically. Synonyms like "pilonidal abscess of natal cleft," "pilonidal disease," or simply "pilonidal abscess" connect these common terms to the exact coding. For cases without abscess, codes L05.9, L05.91, and L05.92 identify cysts or sinuses without infection, often described as "skin dimple," "sacral dimple," or "barber's pilonidal sinus." This coding system helps medical providers and coders accurately document pilonidal disease variations for treatment and billing purposes.