ICD-10 Code I70.433 – Atherosclerosis of autologous vein bypass graft(s) of the right leg with ulceration of ankle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.433 – Atherosclerosis of autologous vein bypass graft(s) of the right leg with ulceration of ankle
What it is
This code identifies atherosclerotic narrowing or blockage in an autologous vein bypass graft in the right leg, with an associated ankle ulcer. Use it when documentation links the graft disease to the ulceration.
Clinical signs
Findings may include poor graft perfusion, diminished distal pulses, limb ischemic pain, or a chronic ankle ulcer. Clinical features vary; refer to documentation for the exact graft site and ulcer relationship.
When to use this code
Use I70.433 when the record states atherosclerosis affects an autologous vein bypass graft in the right leg and the patient has an ankle ulcer. The ulcer must be documented as associated with the bypass graft disease, not simply present by coincidence. Check documentation if the 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. Do not assign it if the graft is not an autologous vein graft.
Coding tip
Confirm three elements in the note: autologous vein graft, right leg, and ankle ulceration.