ICD-10 Code I70.661 – Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene, right leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.661 – Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene, right leg
What it is
This code identifies atherosclerotic narrowing or blockage in a nonbiological bypass graft in the right leg, with gangrene present. Use it when the graft itself is the affected vessel and tissue death is documented.
Clinical signs
Findings usually include poor limb perfusion, ischemic pain, nonhealing wounds, skin discoloration, or blackened tissue in the right leg. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents atherosclerosis affecting a nonbiological bypass graft in the right lower extremity and gangrene is present. Confirm that the graft is synthetic or otherwise nonbiological, not a native artery. If laterality is stated, code the right leg specifically.
Do not use for
Do not use this code for atherosclerosis of native arteries, for bypass grafts without gangrene, or when the documentation does not identify the right leg. Check documentation.
Coding tip
Verify both the graft type and the presence of gangrene before assigning I70.661.