ICD-10 Code I70.668 – Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene, other extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.668 – Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene, other extremity
What it is
This code identifies atherosclerotic narrowing or blockage in a nonbiological bypass graft in an extremity, with gangrene present in the other limb or extremity. Use it when the graft is synthetic or otherwise nonbiologic and gangrene is documented.
Clinical signs
Documented findings may include ischemic tissue loss, blackened or dead tissue, and poor distal perfusion. Clinical features vary; refer to documentation for the affected extremity and confirmation of gangrene.
When to use this code
Use I70.668 when the provider states atherosclerosis affects a nonbiological bypass graft in an extremity and gangrene involves the other extremity. Make sure the record clearly links the graft disease to the gangrene scenario. If the graft type, laterality, or location is unclear, check documentation before assigning the code.
Do not use for
Do not use this code for native artery atherosclerosis without a bypass graft, or for gangrene without documented graft disease. Check documentation if the graft is biologic, the extremity is unspecified, or gangrene is not confirmed.
Coding tip
Verify both the nonbiological graft and the gangrene documentation before coding, because missing laterality or graft type can change the correct ICD-10 selection.