ICD-10 Code L03.129 – Acute lymphangitis of unspecified part of limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.129 – Acute lymphangitis of unspecified part of limb
What it is
This code identifies an acute infection and inflammation of lymphatic vessels in a limb when the affected part is not specified. It is used for a limb-based lymphangitic process without a more precise anatomic location.
Clinical signs
Typical findings include red, tender streaking along the limb, localized swelling, and pain near an infected skin source. Clinical features vary; refer to documentation.
When to use this code
Use L03.129 when the provider documents acute lymphangitis affecting a limb but does not specify the arm, leg, or exact segment. It also fits when the record clearly supports lymphangitis, yet laterality or specific limb location is missing. You should code from the documented diagnosis, not from presumed anatomy.
Do not use for
Do not use this code for chronic lymphatic disorders, cellulitis without lymphangitis, or infections limited to a non-limb site. Check documentation if the note describes a more specific limb location or a different skin infection.
Coding tip
If the chart names the limb or more precise site, select the more specific ICD-10-CM code instead of this unspecified option.