ICD-10 Code I70.493 – Other atherosclerosis of autologous vein bypass graft(s) of the extremities, bilateral legs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.493 – Other atherosclerosis of autologous vein bypass graft(s) of the extremities, bilateral legs
What it is
This code identifies atherosclerotic narrowing or blockage in autologous vein bypass grafts supplying both legs. It applies when the graft itself, not the native artery, is the documented site of disease.
Clinical signs
Clinical features vary; refer to documentation. Findings may include reduced graft patency, diminished distal pulses, limb pain with walking, or signs of lower-extremity ischemia when the bypass graft is affected.
When to use this code
Use this code when the provider documents atherosclerosis in an autologous vein bypass graft in both lower extremities. It is appropriate for follow-up visits, imaging-confirmed graft disease, or assessment of graft-related ischemic symptoms. Confirm that the graft is autologous vein and that both legs are involved.
Do not use for
Do not use this code for atherosclerosis of native leg arteries or for prosthetic bypass graft disease. If the laterality, graft type, or vessel location is unclear, check documentation.
Coding tip
Code the bypass graft site exactly as documented and verify bilateral involvement before assigning I70.493.