ICD-10 Code I70.402 – Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities, left leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.402 – Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities, left leg
What it is
This code identifies atherosclerosis affecting an autologous vein bypass graft in the left leg, without further detail on severity or symptoms. It means plaque-related narrowing or blockage is documented in the graft itself.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include reduced graft flow, leg pain with walking, rest pain, or other signs of limb ischemia, but the record must support graft atherosclerosis.
When to use this code
Use I70.402 when the provider documents atherosclerosis in an autologous vein bypass graft of the left lower extremity and does not specify a more detailed form. It is appropriate when the graft is the site of disease, not the native artery. Check documentation if laterality or graft type is unclear.
Do not use for
Do not use this code for atherosclerosis of native leg arteries or for non-autologous grafts. If the record describes occlusion, embolism, or another more specific graft problem, select the documented condition instead.
Coding tip
Confirm both the graft type and left-leg laterality before assigning I70.402.