ICD-10 Code I70.522 – Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with rest pain, left leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.522 – Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with rest pain, left leg
What it is
This code identifies atherosclerosis affecting a nonautologous biological bypass graft in the left leg, with rest pain. It means the graft has narrowed from plaque buildup and is causing ischemic pain even when the patient is not walking.
Clinical signs
Look for documented peripheral arterial disease in a biological bypass graft, plus rest pain in the left lower extremity. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record states atherosclerosis involves a nonautologous biological bypass graft in the left leg and the patient has rest pain. The laterality and graft type must be clear in the documentation. If the note only says graft disease or limb pain, check documentation.
Do not use for
Do not use it for native-vessel atherosclerosis, pain without documented rest pain, or disease in a different limb. If the graft type or laterality is not specified, check documentation.
Coding tip
Verify both the bypass graft type and the left-leg laterality before assigning I70.522.