ICD-10 Code L03.049 – Acute lymphangitis of unspecified toe (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.049 – Acute lymphangitis of unspecified toe
What it is
L03.049 identifies acute lymphangitis affecting an unspecified toe. Use it when the record documents an acute infection of the lymphatic channels in a toe, but does not specify which toe.
Clinical signs
Typical findings include localized redness, tenderness, swelling, and red streaking extending from the toe. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents acute lymphangitis in a toe and the toe is not named. It is appropriate when the note clearly supports lymphangitic infection, but laterality or a specific toe is missing. If the documentation only says cellulitis or skin infection, do not assume lymphangitis.
Do not use for
Do not use L03.049 for chronic lymphangitis, cellulitis without lymphatic involvement, or infections of a different foot site. Check documentation if the toe, laterality, or diagnosis is unclear.
Coding tip
Assign the unspecified-toe code only after confirming the record does not identify a specific toe.