ICD-10 Code L03.12 – Acute lymphangitis of other parts of limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.12 – Acute lymphangitis of other parts of limb
What it is
L03.12 identifies acute inflammation of lymphatic vessels in an arm or leg, outside the usual hand, foot, or digit locations. You use it when documentation specifies lymphangitis affecting another part of a limb.
Clinical signs
Typical findings include tender, red linear streaking along lymphatic channels, local warmth, and swelling. Regional lymph node tenderness may be present; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents acute lymphangitis involving a specific non-distal part of a limb, such as the forearm or calf. It is appropriate when the note clearly distinguishes lymphangitis from cellulitis or another skin infection. If the site is not stated clearly, check documentation.
Do not use for
Do not use L03.12 for lymphangitis of the hand, foot, fingers, or toes, or when the record only says cellulitis without lymphatic involvement. Check documentation for the exact anatomic site.
Coding tip
Match the code to the documented limb segment and confirm that “acute lymphangitis” is explicitly stated.