ICD-10 Code L03.32A – Acute lymphangitis of flank (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.32A – Acute lymphangitis of flank
What it is
Acute lymphangitis of flank is an acute infection and inflammation of the lymphatic channels in the flank area. The code identifies the anatomic site, so you should confirm the documentation is specific to the flank.
Clinical signs
Typical findings include localized redness, tenderness, warmth, and linear streaking along lymphatic pathways. Regional lymph node enlargement or systemic symptoms may occur, but clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents acute lymphangitis specifically involving the flank. It is appropriate when the record clearly identifies the site and the condition is not better described by a more general cellulitis or abscess code. Check documentation if the note only says “lymphangitis” without location.
Do not use for
Do not use it for chronic lymphatic disease, nonspecific skin infection, or lymphangitis at another body site. If the flank location is not documented, check documentation.
Coding tip
Assign the code only when the provider links lymphangitis to the flank; otherwise, query for the exact site.