ICD-10 Code I70.5 – Atherosclerosis of nonautologous biological bypass graft(s) of the extremities (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.5 – Atherosclerosis of nonautologous biological bypass graft(s) of the extremities
What it is
This code identifies atherosclerotic narrowing or blockage in a nonautologous biological bypass graft in an arm or leg. Use it when the graft itself is affected, not just the native artery.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include reduced blood flow in the grafted limb, diminished pulses, pain with walking, or ischemic changes, when documented by the clinician.
When to use this code
Use I70.5 when the provider documents atherosclerosis involving a nonautologous biological bypass graft in an extremity. It may apply after vascular surgery when the graft becomes narrowed or obstructed by plaque. Code only when the record clearly identifies the graft type and location.
Do not use for
Do not use this code for atherosclerosis of native arteries, synthetic grafts, or unspecified bypass grafts. Check documentation if the graft material or affected vessel is not clearly stated.
Coding tip
Verify both the bypass graft material and the extremity site before assigning I70.5.