ICD-10 Code L02.31 – Cutaneous abscess of buttock (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L02.31 – Cutaneous abscess of buttock
What it is
L02.31 identifies a localized skin abscess on the buttock. It refers to a collection of pus in the cutaneous tissue, usually caused by a bacterial infection.
Clinical signs
Typical findings include a painful, swollen, red, and tender lump on the buttock, sometimes with drainage. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents a cutaneous abscess limited to the buttock skin or subcutaneous tissue. It fits encounters for evaluation, incision and drainage, or follow-up of the same documented lesion. If the provider describes a deeper or different anatomic site, check documentation.
Do not use for
Do not use it for pilonidal disease, perirectal abscess, or abscesses in other body sites. If the note only says “infection” or “boil” without location, check documentation.
Coding tip
Verify that the buttock location is explicitly documented before assigning L02.31.