ICD-10 Code L02.03 – Carbuncle of face (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.03 – Carbuncle of face
What it is
L02.03 identifies a carbuncle on the face. A carbuncle is a deeper skin infection made up of connected boils, usually involving several hair follicles and surrounding tissue.
Clinical signs
Typical findings include a painful, swollen, red, and tender facial lesion with pus drainage or a central opening. Clinical features vary; refer to documentation if the note does not clearly describe a carbuncle.
When to use this code
Use L02.03 when the record specifically documents a carbuncle located on the face. Code it when the provider describes a clustered, suppurative skin infection of the facial area and no more specific site code is documented.
If the note only says “abscess,” “boil,” or “skin infection” without facial location or carbuncle wording, Check documentation before assigning this code.
Do not use for
Do not use this code for facial cellulitis, simple acne lesions, or a non-facial carbuncle. If the condition is documented as a generic abscess without carbuncle detail, use the more accurate code supported by the record.
Coding tip
Confirm both the diagnosis term and the facial site in the provider note before coding L02.03.