ICD-10 Code L03.325 – Acute lymphangitis of perineum (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L03.325 – Acute lymphangitis of perineum
What it is
This code identifies an acute infection and inflammation of the lymphatic vessels in the perineal area. It is used when the chart specifically documents lymphangitis affecting the perineum.
Clinical signs
Typical findings include localized redness, tenderness, swelling, and possible streaking along lymphatic channels. Clinical features vary; refer to documentation.
When to use this code
Use L03.325 when the provider documents acute lymphangitis of the perineum as the diagnosis. It fits cases where the infection is clearly limited to the perineal lymphatic tissue. If the note only says cellulitis, abscess, or perineal infection without lymphangitis, check documentation before coding.
Do not use for
Do not use this code for non-lymphatic skin infections, such as simple cellulitis or abscess, unless lymphangitis is documented. Check documentation if the site or diagnosis is unclear.
Coding tip
Code this only when the provider explicitly names acute lymphangitis and the perineum as the involved site.