ICD-10 Code L02.9 – Cutaneous abscess, furuncle and carbuncle, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.9 – Cutaneous abscess, furuncle and carbuncle, unspecified
What it is
This code identifies a localized skin infection with pus, but the record does not specify whether it is an abscess, furuncle, or carbuncle. Use it when documentation confirms a cutaneous suppurative infection without a more precise site or type.
Clinical signs
Typical findings include a tender, red, swollen skin lesion that may drain pus or have a fluctuant center. Clinical features vary; refer to documentation.
When to use this code
Use L02.9 when the clinician documents a skin abscess, boil, or carbuncle but does not identify the exact type or location. It also fits when the note confirms a cutaneous abscess and no more specific ICD-10 code is supported. Check documentation if the site is known.
Do not use for
Do not use this code for abscesses in internal organs, postoperative wounds, or other non-cutaneous infections. If the record gives a specific site or organism-related diagnosis, code that condition instead.
Coding tip
Code the most specific abscess or boil diagnosis available; use L02.9 only when the documentation stays nonspecific.