I&D abdominal abscess

What is the difference between CPT 10180 and 49020 (besides the hugh difference in RVUs)?

Drainage

Big difference. A pilonidal cyst is a cyst that develops along the tailbone (coccyx) near the cleft of the buttocks. These cysts usually contain hair and skin debris.
Code 49020 is a deep abdominal abscess that is drained. Intra-abdominal abscesses are localized collections of pus that are confined in the peritoneal cavity by an inflammatory barrier.