ICD-10 Code I70.423 – Atherosclerosis of autologous vein bypass graft(s) of the extremities with rest pain, bilateral legs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.423 – Atherosclerosis of autologous vein bypass graft(s) of the extremities with rest pain, bilateral legs
What it is
This code identifies atherosclerotic narrowing in an autologous vein bypass graft in both legs, with pain present at rest. Use it when the graft itself is the documented site of disease.
Clinical signs
Typical findings include ischemic rest pain, often worse at night or when the legs are elevated. Clinical features vary; refer to documentation for evidence of graft-related arterial insufficiency.
When to use this code
Use I70.423 when the record clearly states atherosclerosis of an autologous vein bypass graft in both lower extremities and documents rest pain. The laterality is bilateral, so do not code it as unilateral or unspecified. Check documentation if the note only describes peripheral arterial disease without graft involvement.
Do not use for
Do not use this code for native vessel atherosclerosis, graft occlusion without atherosclerosis, or symptoms alone without documented graft disease. Check documentation when the bypass conduit or laterality is unclear.
Coding tip
Confirm both the graft type and bilateral involvement before assigning I70.423.