ICD-10 Code L02.229 – Furuncle of trunk, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.229 – Furuncle of trunk, unspecified
What it is
This code identifies a furuncle, or boil, located on the trunk when the exact site is not further specified. It represents a localized skin infection centered on a hair follicle.
Clinical signs
Typical findings include a painful, red, swollen nodule that may develop a pus-filled center or drain spontaneously. Clinical features vary; refer to documentation.
When to use this code
Use L02.229 when the provider documents a furuncle on the trunk but does not name a more specific trunk location. It also fits cases where the note confirms a boil on the chest, back, or abdomen without further detail. Check documentation if the lesion is described as an abscess, carbuncle, or another skin infection instead.
Do not use for
Do not use this code for furuncles on a specific trunk subsite when a more precise code is documented. Also avoid it if the record describes a different condition, such as cellulitis or a noninfectious skin lesion.
Coding tip
Code the most specific site available; if the trunk location is vague, L02.229 is appropriate.