ICD-10 Code L02.433 – Carbuncle of right upper limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.433 – Carbuncle of right upper limb
What it is
L02.433 identifies a carbuncle on the right upper limb. A carbuncle is a deeper skin infection made up of connected boils, usually involving hair follicles and surrounding tissue.
Clinical signs
Typical findings include a painful, swollen, red, and draining lesion with multiple openings or pustules. Clinical features vary; refer to documentation.
When to use this code
Use this code when documentation specifies a carbuncle on the right arm, forearm, wrist, or hand, and the laterality is clearly right. You should code it when the provider names carbuncle rather than a generic abscess or cellulitis. Check documentation if the site is described only as “upper limb” without right-side confirmation.
Do not use for
Do not use this code for left-sided or unspecified upper-limb infections, or for conditions documented as simple furuncle, abscess, or cellulitis without carbuncle. Check documentation.
Coding tip
Verify both the diagnosis term and right-sided location before assigning L02.433.