ICD-10 Code L02.435 – Carbuncle of right lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.435 – Carbuncle of right lower limb
What it is
This code identifies a carbuncle, which is a deeper skin infection made up of connected boils, located on the right lower limb. It indicates a localized bacterial abscess in the leg or foot region.
Clinical signs
Typical findings include a painful, swollen, red, and tender area with pus drainage or multiple openings. Fever or surrounding cellulitis may occur; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents a carbuncle on the right leg, ankle, or foot and does not specify a different site. It is appropriate for a confirmed localized skin abscess on the right lower limb. If the note says furuncle, cellulitis, or another lesion instead, check documentation before assigning this code.
Do not use for
Do not use this code for a carbuncle on the left lower limb or an unspecified limb. Do not use it when the diagnosis is only a boil, cellulitis, or another skin infection without documentation of a carbuncle.
Coding tip
Verify laterality and anatomic site in the provider note before coding, because the right lower limb has its own specific ICD-10 code.