ICD-10 Code I70.422 – Atherosclerosis of autologous vein bypass graft(s) of the extremities with rest pain, left leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.422 – Atherosclerosis of autologous vein bypass graft(s) of the extremities with rest pain, left leg
What it is
This code identifies atherosclerotic narrowing in an autologous vein bypass graft in the left leg, with rest pain. It indicates reduced blood flow through the graft rather than native artery disease alone.
Clinical signs
Typical findings include ischemic pain in the left leg or foot that occurs at rest, often worse at night or when the limb is elevated. Clinical features vary; refer to documentation.
When to use this code
Use I70.422 when the provider documents atherosclerosis affecting an autologous vein bypass graft in the left lower extremity and specifically notes rest pain. The record should support the graft type, laterality, and symptom. If documentation only states graft disease without rest pain, check documentation.
Do not use for
Do not use this code for native artery atherosclerosis, graft occlusion without atherosclerosis, or symptoms not linked to the bypass graft. If the side or graft type is not documented, check documentation.
Coding tip
Confirm both the autologous vein graft and left-leg rest pain are documented before assigning I70.422.