ICD-10 Code I70.662 – Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene, left leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.662 – Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene, left leg
What it is
This code identifies atherosclerotic disease in a nonbiological bypass graft in the left leg, with gangrene present. Use it when the graft supplying the extremity is narrowed or blocked by plaque and tissue death is documented.
Clinical signs
Typical findings include poor limb perfusion, ischemic pain, nonhealing wounds, and black or necrotic tissue in the left leg. Clinical features vary; refer to documentation.
When to use this code
Use I70.662 when the provider documents atherosclerosis affecting a nonbiological bypass graft in the left lower extremity and gangrene is present. The record should support the graft location and laterality. If gangrene is not documented, choose a different code.
Do not use for
Do not use this code for native artery disease, biologic grafts, or bypass grafts without gangrene. Check documentation if the record only states peripheral vascular disease or limb ischemia.
Coding tip
Confirm the graft type, left-sided location, and gangrene in the provider note before assigning this code.