ICD-10 Code L02.63 – Carbuncle of foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.63 – Carbuncle of foot
What it is
L02.63 identifies a carbuncle on the foot, which is a deeper skin infection made up of connected boils. Use it when the documentation specifically states a carbuncle involving the foot.
Clinical signs
Typical findings include a painful, swollen, red area on the foot with pus drainage or multiple openings. Clinical features vary; refer to documentation.
When to use this code
Use L02.63 when the provider documents a carbuncle limited to the foot and does not specify another site. It is appropriate for office, urgent care, or inpatient records that clearly identify the foot as the affected location. Check documentation if the note only says abscess, boil, or skin infection.
Do not use for
Do not use this code for cellulitis, abscess without carbuncle documentation, or infections at other body sites. If the record is nonspecific, check documentation.
Coding tip
Confirm both the diagnosis and anatomic site in the provider note before assigning L02.63.