ICD-10 Code I70.508 – Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities, other extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.508 – Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities, other extremity
What it is
This code identifies atherosclerotic narrowing or blockage in a nonautologous biological bypass graft in an extremity, when the affected limb site is other than the specified categories. Use it when the record does not name a more specific extremity location.
Clinical signs
Clinical features vary; refer to documentation. Findings may include reduced graft patency, diminished distal perfusion, claudication, pain, or ischemic changes in the involved limb.
When to use this code
Use I70.508 when the provider documents atherosclerosis involving a nonautologous biological bypass graft in an extremity and does not specify a more exact site. You should also use it when the chart clearly identifies the graft and limb involvement, but the location is documented only as “other extremity.”
Do not use for
Do not use this code for native vessel atherosclerosis, autologous vein graft disease, or graft problems unrelated to atherosclerosis. Check documentation if the record describes occlusion, embolism, infection, or another complication instead.
Coding tip
Confirm the graft type and the exact extremity site in the operative or vascular note before assigning this code.