ICD-10 Code I70.593 – Other atherosclerosis of nonautologous biological bypass graft(s) of the extremities, bilateral legs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.593 – Other atherosclerosis of nonautologous biological bypass graft(s) of the extremities, bilateral legs
What it is
This code identifies atherosclerotic narrowing or blockage affecting a nonautologous biological bypass graft in both lower extremities. Use it when the graft itself, not the native artery, is documented as the site of disease.
Clinical signs
Clinical features vary; refer to documentation. Commonly, notes describe reduced graft patency, limb ischemia, diminished pulses, claudication, or other evidence that the bypass graft is affected by atherosclerosis.
When to use this code
Use I70.593 when the provider documents atherosclerosis involving a biological bypass graft in both legs and specifies the graft as nonautologous. Confirm that the condition is bilateral and that the bypass graft is the affected vessel. If laterality or graft type is unclear, check documentation before coding.
Do not use for
Do not use this code for atherosclerosis of native leg arteries, autologous vein grafts, or graft occlusion without documented atherosclerosis. Check documentation if the record only states peripheral arterial disease or bypass graft stenosis.
Coding tip
Verify three elements in the chart: atherosclerosis, nonautologous biological graft, and bilateral legs.