ICD-10 Code I70.321 – Atherosclerosis of unspecified type of bypass graft(s) of the extremities with rest pain, right leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.321 – Atherosclerosis of unspecified type of bypass graft(s) of the extremities with rest pain, right leg
What it is
This code identifies atherosclerotic narrowing or blockage in an unspecified bypass graft in the leg, with rest pain affecting the right leg. It reflects poor blood flow severe enough to cause pain even when the patient is not active.
Clinical signs
Typical findings include ischemic leg pain at rest, often worse at night or when the leg is elevated. Clinical features vary; refer to documentation for graft type, laterality, and evidence of peripheral arterial disease.
When to use this code
Use this code when the provider documents atherosclerosis in a bypass graft of the extremities and specifically notes rest pain in the right leg. The graft type is not specified, so do not assume venous or arterial material. Verify that the record supports ischemic rest pain rather than exertional claudication.
Do not use for
Do not use this code if the graft type is documented and a more specific code applies, or if the pain is only exertional. Check documentation if the record describes acute limb ischemia or a different cause of leg pain.
Coding tip
Capture the exact graft laterality and pain location, because missing details can change the ICD-10-CM code.