ICD-10 Code L03.126 – Acute lymphangitis of left lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.126 – Acute lymphangitis of left lower limb
What it is
This code identifies an acute infection and inflammation of the lymphatic vessels in the left lower limb. It usually reflects spreading skin or soft tissue infection with linear lymphatic involvement.
Clinical signs
Typical findings include redness, warmth, swelling, tenderness, and red streaking extending along lymphatic channels. Fever or regional lymph node enlargement may occur, but clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents acute lymphangitis limited to the left lower limb. It is appropriate when the provider specifies lymphatic vessel infection or lymphangitic streaking in that location. Check documentation if the note only describes cellulitis, abscess, or nonspecific leg infection.
Do not use for
Do not use this code for chronic lymphatic disorders, lymphedema, or infection in another limb. If the chart does not specify the left lower limb, you should not assume laterality.
Coding tip
Capture the documented laterality exactly, because this code is site-specific and should match the provider’s stated limb.