ICD-10 Code I70.431 – Atherosclerosis of autologous vein bypass graft(s) of the right leg with ulceration of thigh (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.431 – Atherosclerosis of autologous vein bypass graft(s) of the right leg with ulceration of thigh
What it is
This code identifies atherosclerotic narrowing or blockage in an autologous vein bypass graft in the right leg, with an associated ulcer on the thigh. Use it when the documentation links the graft disease and the ulceration.
Clinical signs
Findings may include reduced limb perfusion, graft-related ischemic symptoms, and a documented ulcer on the right thigh. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents atherosclerosis affecting an autologous vein bypass graft in the right leg and specifies ulceration of the thigh. It fits cases where the ulcer is part of the coded vascular disease picture. Check documentation if laterality, graft type, or ulcer location is unclear.
Do not use for
Do not use this code for native artery atherosclerosis without a bypass graft, or for ulcers not linked to the graft disease. If the graft type or ulcer site is different, choose the documented code instead.
Coding tip
Confirm the graft is autologous vein, the leg is right-sided, and the ulcer is documented on the thigh before assigning I70.431.