ICD-10 Code I72.4 – Aneurysm of artery of lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I72.4 – Aneurysm of artery of lower extremity
What it is
This code identifies a localized abnormal dilation of an artery in the lower extremity. It is used when the record documents an aneurysm affecting a leg artery, not a vein or generalized vascular disease.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a pulsatile mass, limb pain, swelling, diminished distal pulses, or imaging evidence of focal arterial enlargement in the leg.
When to use this code
Use I72.4 when the provider documents aneurysm of a lower-extremity artery, such as femoral, popliteal, or other leg arterial involvement. It also fits when imaging confirms the diagnosis and the note clearly links it to the lower limb. Check documentation if the artery site is not specified.
Do not use for
Do not use this code for venous aneurysms, pseudoaneurysms, or aneurysms in the aorta or other non-lower-extremity vessels. If the record only says “vascular aneurysm” without location, check documentation.
Coding tip
Code the documented artery location as specifically as possible and confirm that the aneurysm is in the lower extremity before assigning I72.4.