ICD-10 Code L03.04 – Acute lymphangitis of toe (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.04 – Acute lymphangitis of toe
What it is
L03.04 identifies acute inflammation of the lymphatic vessels in a toe. It usually reflects an acute bacterial infection spreading through the superficial lymphatic channels.
Clinical signs
Typical findings include localized toe redness, swelling, warmth, and tenderness with possible red streaking extending proximally. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents acute lymphangitis limited to a toe, or infection of the toe lymphatics with clear anatomic location. It is appropriate when the record distinguishes this from cellulitis, abscess, or more diffuse foot infection. Check documentation if the site or acuity is unclear.
Do not use for
Do not use it for chronic lymphangitis, nonspecific toe pain, or cellulitis without lymphatic involvement. Do not assume the toe site if the documentation only says “foot infection.”
Coding tip
Verify both acuity and exact toe location in the note before assigning L03.04.