ICD-10 Code L03.319 – Cellulitis of trunk, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.319 – Cellulitis of trunk, unspecified
What it is
This code identifies cellulitis affecting the trunk when the record does not specify a more precise site. It refers to a bacterial skin and soft tissue infection involving the trunk area.
Clinical signs
Typical findings include localized redness, warmth, swelling, tenderness, and skin pain over the trunk. Clinical features vary; refer to documentation for the exact location and extent.
When to use this code
Use L03.319 when the provider documents cellulitis of the trunk but does not name a specific subsite such as chest wall, back, or abdominal wall. It is also appropriate when the note clearly supports trunk cellulitis and no more specific code is available. Check documentation if the site is ambiguous.
Do not use for
Do not use this code for cellulitis of a more specific body site when that information is documented. Do not use it for noninfectious dermatitis, abscess alone, or unspecified skin redness without cellulitis.
Coding tip
Code the most specific anatomic site documented; if the trunk location is unclear, query the provider before assigning L03.319.