ICD-10 Code L02.422 – Furuncle of left axilla (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.422 – Furuncle of left axilla
What it is
L02.422 identifies a boil, or localized skin abscess, in the left armpit. It is used when documentation specifies the left axilla as the site.
Clinical signs
Typical findings include a tender, red, swollen nodule in the left axilla that may drain pus. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents a furuncle, boil, or localized abscess specifically in the left axilla. It is appropriate when the record clearly identifies the left side and does not describe a broader skin infection.
If the note only says “axillary abscess” without laterality, check documentation before assigning L02.422. Code the condition as documented and avoid inferring the side from exam wording alone.
Do not use for
Do not use this code for a right or unspecified axillary lesion, or for hidradenitis suppurativa unless that diagnosis is explicitly documented. Check documentation.
Coding tip
Confirm both the diagnosis and left-sided location in the assessment or impression before coding L02.422.