ICD-10 Code L02.239 – Carbuncle of trunk, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.239 – Carbuncle of trunk, unspecified
What it is
This code identifies a carbuncle on the trunk when the specific site is not documented. A carbuncle is a deeper skin infection made up of interconnected boils.
Clinical signs
Look for a painful, swollen, red, and often draining lesion on the trunk. Clinical features vary; refer to documentation for whether the provider describes a clustered abscess or multiple connected pustules.
When to use this code
Use L02.239 when the record clearly states a carbuncle involving the trunk but does not name a more specific trunk location. It is appropriate when the provider documents a carbuncle of the chest, back, abdomen, or similar area without further detail. If the site is specified, code the more precise option instead.
Do not use for
Do not use this code for a simple furuncle, cellulitis, or an abscess without documentation of a carbuncle. Check documentation if the lesion site is not on the trunk or if the diagnosis is unclear.
Coding tip
Assign this code only when both the trunk location and the carbuncle diagnosis are documented.