ICD-10 Code L02.92 – Furuncle, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.92 – Furuncle, unspecified
What it is
L02.92 identifies a furuncle, or boil, when the site or additional detail is not specified. Use it for a localized skin infection centered on a hair follicle when documentation does not name another abscess code.
Clinical signs
Typical findings include a painful, red, swollen nodule that may enlarge and drain pus. Clinical features vary; refer to documentation for the exact location, severity, and whether more than one lesion is present.
When to use this code
Use L02.92 when the record states “furuncle” or “boil” but does not identify a body site. It also fits when the clinician documents a furuncle without enough detail to assign a more specific abscess code. Verify that the note is not describing cellulitis, carbuncle, or another skin infection.
Do not use for
Do not use this code for a carbuncle, a cutaneous abscess with a specified site, or cellulitis. If the documentation gives a more specific diagnosis or location, code that instead.
Coding tip
Check the note for site, laterality, and whether the lesion is a furuncle versus a carbuncle before defaulting to L02.92.