ICD-10 Code I70.669 – Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene, unspecified extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.669 – Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene, unspecified extremity
What it is
This code identifies atherosclerotic narrowing or blockage in a nonbiological bypass graft in an extremity, with gangrene present. Use it when documentation specifies the graft type and says the affected extremity is not identified.
Clinical signs
Expect signs of poor limb perfusion, including ischemic tissue loss and gangrene. Clinical features vary; refer to documentation for the affected limb, graft details, and whether the gangrene is dry or wet.
When to use this code
Use I70.669 when the provider documents atherosclerosis involving a nonbiological bypass graft in an arm or leg and also documents gangrene. This code is appropriate only when the record does not specify which extremity is involved. Check documentation if laterality is available.
Do not use for
Do not use this code if the graft is biological, if gangrene is absent, or if the chart identifies a specific extremity. Do not guess the limb; code the documented site instead.
Coding tip
Verify both the graft type and the presence of gangrene before assigning I70.669.