ICD-10 Code I70.3 – Atherosclerosis of unspecified type of bypass graft(s) of the extremities (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.3 – Atherosclerosis of unspecified type of bypass graft(s) of the extremities
What it is
This code identifies atherosclerotic narrowing or blockage in a bypass graft supplying an extremity when the graft type is not specified. Use it for peripheral graft disease involving the arms or legs.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include reduced limb perfusion, exertional pain, or signs of graft dysfunction noted on exam or imaging.
When to use this code
Use this code when the record states atherosclerosis affects an unspecified bypass graft in an extremity and no graft type is documented. It fits postoperative follow-up, vascular studies, or specialist notes describing graft disease. If the graft is described more specifically, code that documented detail instead.
Do not use for
Do not use this code for native artery atherosclerosis without a bypass graft. Also avoid it when the graft type or anatomic site is documented more specifically and a more precise code applies.
Coding tip
Check the operative note and vascular documentation for graft type and limb site before assigning the unspecified code.