ICD-10 Code I70.492 – Other atherosclerosis of autologous vein bypass graft(s) of the extremities, left leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.492 – Other atherosclerosis of autologous vein bypass graft(s) of the extremities, left leg
What it is
This code identifies atherosclerotic narrowing or blockage in an autologous vein bypass graft supplying the left leg. It applies when the graft itself, not the native artery, is affected.
Clinical signs
Findings may include reduced leg perfusion, exertional pain, rest pain, or poor graft flow on imaging. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record documents atherosclerosis involving an autologous vein bypass graft in the left lower extremity. It fits postoperative patients with graft disease confirmed by provider assessment, imaging, or vascular follow-up. Code only when the left leg location is clearly stated.
Do not use for
Do not use it for atherosclerosis of the native leg arteries or for graft disease in another limb. Check documentation if the record does not specify an autologous vein graft or left-sided involvement.
Coding tip
Confirm both graft type and laterality in the operative or follow-up note before assigning I70.492.