ICD-10 Code L02.425 – Furuncle of right lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.425 – Furuncle of right lower limb
What it is
L02.425 identifies a furuncle, or boil, on the right lower limb. It is a localized bacterial infection of a hair follicle that forms a painful, pus-filled nodule.
Clinical signs
Typical findings include a tender, red, swollen lump that may drain pus or develop a central point. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents a furuncle specifically on the right leg, thigh, calf, ankle, or other right lower-limb site. You should code the documented location as written and confirm laterality is right. If the note only says “boil” without site detail, check documentation.
Do not use for
Do not use this code for a furuncle on the left lower limb, another body site, or a generalized skin infection. Check documentation if the lesion is described as an abscess, carbuncle, or cellulitis instead.
Coding tip
Verify both the lesion type and the right-sided lower-limb location before assigning L02.425.