ICD-10 Code L02.522 – Furuncle left hand (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.522 – Furuncle left hand
What it is
L02.522 identifies a furuncle, or boil, on the left hand. It is a localized skin and soft tissue infection centered on a hair follicle, usually forming a painful, pus-filled lesion.
Clinical signs
Typical findings include a tender, red, swollen nodule that may enlarge and drain pus. Clinical features vary; refer to documentation for location, severity, and whether abscess formation is present.
When to use this code
Use this code when documentation specifically states a furuncle on the left hand. It is appropriate when the provider identifies the lesion site clearly and does not describe a broader skin infection. Check documentation if the note instead says abscess, cellulitis, or another hand infection.
Do not use for
Do not use it for boils on other body sites or for an unspecified hand infection. Do not assign it when the record only mentions cellulitis, abscess, or a lesion without confirming a furuncle.
Coding tip
Verify the laterality and anatomic site in the note before assigning L02.522.