ICD-10 Code L03.323 – Acute lymphangitis of chest wall (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.323 – Acute lymphangitis of chest wall
What it is
Acute lymphangitis of the chest wall is an acute infection and inflammation of lymphatic vessels in the chest wall. You use this code when documentation identifies lymphangitis localized to that area.
Clinical signs
Typical findings include tender, red linear streaking and localized swelling along lymphatic channels, often with nearby skin infection. Clinical features vary; refer to documentation.
When to use this code
Use L03.323 when the provider documents acute lymphangitis specifically involving the chest wall. It may be supported by notes describing spreading erythema or lymphatic streaking in that region. If the record only states cellulitis or abscess, check documentation before assigning this code.
Do not use for
Do not use this code for chronic lymphangitis or lymphadenitis without lymphangitis. If the infection site is elsewhere on the body, choose the code that matches the documented location.
Coding tip
Confirm both acuity and anatomic site in the provider note before coding L03.323.