ICD-10 Code I70.46 – Atherosclerosis of autologous vein bypass graft(s) of the extremities with gangrene (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.46 – Atherosclerosis of autologous vein bypass graft(s) of the extremities with gangrene
What it is
This code identifies atherosclerotic narrowing or blockage in an autologous vein bypass graft in an extremity, with gangrene present. It applies when the graft uses the patient’s own vein and tissue death has developed.
Clinical signs
Findings may include severe limb ischemia, nonhealing wounds, skin discoloration, and gangrenous tissue in the affected extremity. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents atherosclerosis affecting an autologous vein bypass graft in an arm or leg and gangrene is present. The record should clearly link the graft disease to the extremity and confirm the gangrenous complication. If the graft type or laterality is unclear, check documentation.
Do not use for
Do not use this code for native artery atherosclerosis, nonautologous graft disease, or bypass graft problems without gangrene. If the chart does not specify an autologous vein graft, this code is not appropriate.
Coding tip
Verify the graft type, extremity location, and presence of gangrene before assigning I70.46.