ICD-10 Code L02.521 – Furuncle right hand (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.521 – Furuncle right hand
What it is
L02.521 identifies a furuncle, or boil, located on the right hand. It refers to a localized skin infection involving a hair follicle and surrounding tissue.
Clinical signs
Typical findings include a tender, red, swollen nodule that may develop a central pustule or drain pus. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents a furuncle specifically on the right hand. It fits a localized boil or abscessed follicular infection on that side. Confirm laterality and anatomic site in the note before assigning the code.
Do not use for
Do not use it for furuncles on the left hand, unspecified hand, or other body sites. Check documentation if the lesion is described as a carbuncle, cellulitis, or another infection.
Coding tip
Verify both the diagnosis and the right-hand location, because laterality drives code selection.