ICD-10 Code L03.02 – Acute lymphangitis of finger (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.02 – Acute lymphangitis of finger
What it is
L03.02 identifies an acute infection and inflammation of the lymphatic vessels in a finger. Use it when documentation specifically states acute lymphangitis affecting a finger.
Clinical signs
Typical findings include red streaking extending from the finger, localized swelling, tenderness, and warmth. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents acute lymphangitis of a finger as the diagnosis. It fits encounters where the infection is clearly limited to a finger rather than the hand or arm.
If the note only describes cellulitis, abscess, or another skin infection, confirm the exact diagnosis before coding. Check documentation when the anatomic site or infection type is unclear.
Do not use for
Do not use this code for lymphangitis in other body sites or for noninfectious lymphatic conditions. Do not assume it applies to cellulitis without explicit documentation of lymphangitis.
Coding tip
Verify both the acute nature and the finger location in the provider’s note before assigning L03.02.