ICD-10 Code I70.329 – Atherosclerosis of unspecified type of bypass graft(s) of the extremities with rest pain, unspecified extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.329 – Atherosclerosis of unspecified type of bypass graft(s) of the extremities with rest pain, unspecified extremity
What it is
This code identifies atherosclerosis affecting an unspecified bypass graft in an extremity, with rest pain present and the affected limb not specified. Use it when the record documents graft disease and ischemic pain at rest.
Clinical signs
Typical findings include ischemic rest pain in the affected limb, often worse when the leg is elevated or at night. Clinical features vary; refer to documentation for the graft type and laterality.
When to use this code
Use I70.329 when the provider documents atherosclerosis of a bypass graft in an extremity and specifically notes rest pain, but does not identify the graft type or the side. It is appropriate for postoperative vascular follow-up when the diagnosis is clearly stated.
Check documentation if the chart only mentions peripheral arterial disease, claudication, or graft occlusion without rest pain. You need both the bypass graft involvement and the rest-pain qualifier.
Do not use for
Do not use this code for native vessel atherosclerosis, claudication without rest pain, or an unspecified limb when the record does not mention a bypass graft. Do not assume laterality; check documentation.
Coding tip
Assign the most specific bypass-graft and laterality code available; if the record is nonspecific, I70.329 captures the unspecified graft and unspecified extremity.