ICD-10 Code I70.51 – Atherosclerosis of nonautologous biological bypass graft(s) of the extremities intermittent claudication (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.51 – Atherosclerosis of nonautologous biological bypass graft(s) of the extremities intermittent claudication
What it is
This code identifies atherosclerotic narrowing or blockage in a nonautologous biological bypass graft in an extremity, with intermittent claudication. It means the graft is affecting blood flow enough to cause exertional leg pain.
Clinical signs
Typical findings include leg pain or cramping with walking that improves with rest, along with evidence of graft-related arterial disease. Clinical features vary; refer to documentation.
When to use this code
Use I70.51 when the record clearly documents atherosclerosis in a nonautologous biological bypass graft of an arm or leg and intermittent claudication is present. You should link the diagnosis to the graft site and the claudication finding. Check documentation if the note does not specify the graft type or the symptom.
Do not use for
Do not use this code for native artery atherosclerosis without a bypass graft, or for claudication not documented as related to the graft. If the graft type is different or unspecified, check documentation.
Coding tip
Verify both the graft material and the presence of intermittent claudication before assigning I70.51.