ICD-10 Code I70.42 – Atherosclerosis of autologous vein bypass graft(s) of the extremities with rest pain (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.42 – Atherosclerosis of autologous vein bypass graft(s) of the extremities with rest pain
What it is
This code identifies atherosclerotic narrowing in an autologous vein bypass graft in an extremity when the patient has rest pain. It applies to graft disease after bypass surgery, not native artery disease.
Clinical signs
Typical documentation includes ischemic rest pain in the affected limb, often worse at night or when the leg is elevated. You may also see diminished perfusion findings; clinical features vary, refer to documentation.
When to use this code
Use this code when the provider documents atherosclerosis affecting an autologous vein bypass graft in an arm or leg and specifically notes rest pain. It is appropriate for postoperative graft complications involving arterial insufficiency. Check that the note identifies the graft type and the symptom.
Do not use for
Do not use this code for atherosclerosis of native arteries, other bypass graft types, or graft disease without rest pain. If the documentation is unclear, check documentation.
Coding tip
Confirm both the graft material and the presence of rest pain before assigning I70.42.