ICD-10 Code I70.302 – Unspecified atherosclerosis of unspecified type of bypass graft(s) of the extremities, left leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.302 – Unspecified atherosclerosis of unspecified type of bypass graft(s) of the extremities, left leg
What it is
This code identifies atherosclerotic narrowing or blockage in a bypass graft supplying the left leg, when the graft type is not specified. Use it when documentation confirms graft disease but does not name the graft material or configuration.
Clinical signs
Findings may include reduced leg perfusion, diminished pulses, claudication, rest pain, or other ischemic symptoms. Clinical features vary; refer to documentation for the specific graft problem and affected limb.
When to use this code
Use I70.302 when the provider documents atherosclerosis affecting a bypass graft in the left lower extremity and does not specify the graft type. It is appropriate for postoperative vascular follow-up, graft surveillance, or evaluation of graft-related ischemic symptoms. Code this only when the left leg is clearly identified.
Do not use for
Do not use this code for native artery atherosclerosis, right leg graft disease, or unspecified limb involvement. Check documentation if the note describes graft occlusion, thrombosis, or another vascular disorder instead.
Coding tip
Verify both the bypass graft location and the laterality, because left-leg graft disease requires a specific code.