ICD-10-CM > L00-L99 > L00-L08 > L02 > L02.2 > L02.23 L02.23 Carbuncle of trunk Non-Billable/Non-Specific Codes L02.231Carbuncle of abdominal wallL02.232Carbuncle of back [any part, except buttock]L02.233Carbuncle of chest wallL02.234Carbuncle of groinL02.235Carbuncle of perineumL02.236Carbuncle of umbilicusL02.239Carbuncle of trunk, unspecified