ICD-10 Code L02.631 – Carbuncle of right foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.631 – Carbuncle of right foot
What it is
This code identifies a carbuncle located on the right foot. A carbuncle is a deeper skin infection made up of connected boils, usually caused by bacteria.
Clinical signs
Typical findings include a painful, swollen, red area with pus drainage and possible surrounding warmth or tenderness. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents a carbuncle specifically on the right foot. It applies when the right-sided location is clear in the record and the lesion is described as a carbuncle rather than a simple abscess or boil.
If documentation lists multiple skin infections, code the right foot carbuncle only when it is separately identified. Check documentation if the site, laterality, or lesion type is unclear.
Do not use for
Do not use this code for a furuncle, cellulitis, or abscess without documentation of a carbuncle. Do not assign it if the infection is on the left foot or another body site.
Coding tip
Verify laterality and exact lesion wording in the note before assigning L02.631.