ICD-10 Code I70.703 – Unspecified atherosclerosis of other type of bypass graft(s) of the extremities, bilateral legs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.703 – Unspecified atherosclerosis of other type of bypass graft(s) of the extremities, bilateral legs
What it is
This code identifies atherosclerotic narrowing or blockage affecting bypass graft(s) in both lower extremities when the graft type is other than the standard categories and the documentation does not specify the exact graft vessel.
Clinical signs
Findings may include reduced leg circulation, exertional leg pain, coolness, diminished pulses, or graft-related ischemic symptoms. Clinical features vary; refer to documentation.
When to use this code
Use I70.703 when the record documents atherosclerosis involving bypass graft(s) in both legs and the provider does not identify a more specific graft type. It also fits when the condition is described as unspecified and both extremities are affected. Check documentation if the laterality or graft details are unclear.
Do not use for
Do not use this code for native artery atherosclerosis without a bypass graft, or when the graft type is specifically documented and a more precise code is available. Do not assume bilateral disease unless both legs are stated.
Coding tip
Verify the operative history and laterality before assigning I70.703, and query for missing graft detail if the note is incomplete.