ICD-10 Code I70.561 – Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with gangrene, right leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.561 – Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with gangrene, right leg
What it is
This code identifies atherosclerotic narrowing or blockage in a nonautologous biological bypass graft in the right leg, with gangrene present. It applies when the graft itself is the affected vessel and tissue death is documented.
Clinical signs
Findings may include poor limb perfusion, ischemic skin changes, and gangrenous tissue in the right lower extremity. Clinical features vary; refer to documentation for graft type, laterality, and the presence of gangrene.
When to use this code
Use I70.561 when the provider documents atherosclerosis affecting a nonautologous biological bypass graft in the right leg and gangrene is also present. Code it from operative, vascular, or discharge documentation that clearly links the graft disease to the right extremity.
Make sure the record specifies a biological, nonautologous graft rather than a native artery or synthetic bypass. If gangrene is not documented, or the laterality is unclear, check documentation before assigning this code.
Do not use for
Do not use this code for atherosclerosis of native arteries, other graft types, or disease in a different limb. Do not use it when gangrene is absent or not confirmed in the record.
Coding tip
Verify both graft type and right-leg laterality in the provider note before coding.