ICD-10 Code I70.363 – Atherosclerosis of unspecified type of bypass graft(s) of the extremities with gangrene, bilateral legs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.363 – Atherosclerosis of unspecified type of bypass graft(s) of the extremities with gangrene, bilateral legs
What it is
This code identifies atherosclerotic disease in an unspecified bypass graft of the leg arteries, with gangrene affecting both lower extremities. Use it when documentation confirms graft involvement and tissue death from poor blood flow.
Clinical signs
Findings may include ischemic pain, cold or pale feet, diminished pulses, and black, necrotic tissue in both legs. Clinical features vary; refer to documentation for the graft type and extent of gangrene.
When to use this code
Use this code when the provider documents atherosclerosis in a bypass graft of the extremities and gangrene in both legs. It fits postoperative or chronic vascular disease notes that clearly link the graft disease to bilateral gangrene. Check documentation if the graft type is not specified.
Do not use for
Do not use this code for native artery atherosclerosis without bypass graft involvement, or for gangrene without documented atherosclerotic graft disease. If the record names a specific graft type, use the more specific code.
Coding tip
Confirm both the bypass graft involvement and bilateral gangrene are documented before assigning I70.363.