ICD-10 Code I70.43 – Atherosclerosis of autologous vein bypass graft(s) of the right leg with ulceration (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.43 – Atherosclerosis of autologous vein bypass graft(s) of the right leg with ulceration
What it is
This code identifies atherosclerotic narrowing or blockage in an autologous vein bypass graft in the right leg, with an associated ulcer. It applies when the graft is the diseased vessel and the ulceration is documented.
Clinical signs
Clinical features may include poor leg perfusion, graft-related ischemic symptoms, and a documented ulcer on the right lower extremity. Clinical features vary; refer to documentation.
When to use this code
Use I70.43 when the provider documents atherosclerosis affecting an autologous vein bypass graft in the right leg and also notes ulceration. The ulcer must be linked to the vascular disease in the record. If laterality or graft type is unclear, check documentation before assigning the code.
Do not use for
Do not use this code for ulcers without documented atherosclerosis, or for disease in a nonautologous graft. Do not code it when the affected leg is not the right leg.
Coding tip
Confirm both the bypass graft type and the ulceration site in the operative or progress note before coding.