ICD-10 Code I70.609 – Unspecified atherosclerosis of nonbiological bypass graft(s) of the extremities, unspecified extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.609 – Unspecified atherosclerosis of nonbiological bypass graft(s) of the extremities, unspecified extremity
What it is
This code identifies atherosclerotic narrowing or blockage in a nonbiological bypass graft in an extremity when the affected limb is not specified. Use it when the record documents graft atherosclerosis but not a more specific site.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include reduced limb perfusion, exertional leg pain, diminished pulses, or graft-related ischemic symptoms, but the record should support the diagnosis.
When to use this code
Use I70.609 when the provider documents atherosclerosis involving a synthetic or other nonbiologic bypass graft in an arm or leg and does not identify the extremity. It also fits when the chart confirms graft disease but is otherwise nonspecific. Check documentation if native artery disease is the real diagnosis.
Do not use for
Do not use this code for atherosclerosis of native arteries, graft infection, or mechanical graft failure without atherosclerosis. If the limb or graft type is specified elsewhere, choose the more precise code.
Coding tip
Verify that “nonbiological bypass graft” and “unspecified extremity” are both documented before assigning I70.609.