ICD-10 Code L03.322 – Acute lymphangitis of back [any part except buttock] (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.322 – Acute lymphangitis of back [any part except buttock]
What it is
L03.322 identifies acute inflammation of lymphatic vessels in the back, excluding the buttock. It usually reflects a spreading skin or soft tissue infection that tracks along lymph channels.
Clinical signs
Look for localized redness, tenderness, swelling, and sometimes linear streaking extending from an infected area on the back. Fever or enlarged nearby lymph nodes may occur; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents acute lymphangitis involving the back, and the site is clearly the back rather than the buttock. It fits cases where the infection is described as lymphangitic spread from a skin lesion or wound. If the note is vague, check documentation before coding.
Do not use for
Do not use L03.322 for cellulitis without lymphangitis, or for infections documented on the buttock. If the record does not clearly identify acute lymphangitis of the back, check documentation.
Coding tip
Match the anatomic site exactly; “back” and “buttock” are coded differently, so confirm the provider’s wording.