ICD-10 Code L02.529 – Furuncle Unspecified Hand (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.529 – Furuncle unspecified hand
What it is
L02.529 identifies a furuncle, or boil, on the hand when the specific hand site is not documented. It represents a localized skin abscess centered on a hair follicle.
Clinical signs
Typical findings include a painful, red, swollen nodule that may become fluctuant or drain pus. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly states a furuncle of the hand but does not specify left or right, or a more exact hand location. You should code from the provider’s documented diagnosis, not from presumed laterality.
Do not use for
Do not use this code for cellulitis, abscesses not described as furuncles, or a furuncle at a different body site. Check documentation if the note only says “skin infection” or “boil” without a hand diagnosis.
Coding tip
If laterality is documented, choose the more specific hand code instead of the unspecified code.