ICD-10 Code L03.315 – Cellulitis of perineum (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.315 – Cellulitis of perineum
What it is
L03.315 identifies cellulitis affecting the perineum, the skin and soft tissue between the genital and anal areas. Use it when the record documents a bacterial skin infection in that specific location.
Clinical signs
Typical findings include localized redness, warmth, swelling, tenderness, and spreading skin inflammation in the perineal region. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents cellulitis of the perineum, perineal soft tissue infection, or an equivalent diagnosis in that anatomic site. It is appropriate when the infection is clearly limited to the perineum. If the note only says “cellulitis” without location, check documentation before assigning L03.315.
Do not use for
Do not use this code for abscess, necrotizing infection, or other perineal conditions unless cellulitis is specifically documented. Check documentation if the diagnosis is a general skin infection elsewhere.
Coding tip
Code the exact documented site; perineal cellulitis is not the same as vulvar, scrotal, or anal skin cellulitis.