ICD-10 Code I70.401 – Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities, right leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.401 – Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities, right leg
What it is
This code identifies atherosclerosis affecting an autologous vein bypass graft in the right leg, when the record does not specify the graft segment or severity. Use it for graft-related arterial narrowing documented in the right lower extremity.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include reduced graft patency, diminished distal pulses, leg pain with walking, or signs of poor limb perfusion, but the chart should support the diagnosis.
When to use this code
Use this code when the provider documents atherosclerosis of an autologous vein bypass graft in the right leg and does not give a more specific graft location or type. It also applies when the condition is described as unspecified but clearly tied to the right lower-extremity bypass graft. Check documentation if the note only mentions peripheral arterial disease without graft involvement.
Do not use for
Do not use this code for native artery atherosclerosis, nonautologous graft disease, or disease in another limb. If the record identifies a more specific bypass graft site or laterality, code that instead.
Coding tip
Verify that the bypass graft is autologous vein and that the right leg is documented before selecting I70.401.