ICD-10 Code I70.303 – Unspecified atherosclerosis of unspecified type of bypass graft(s) of the extremities, bilateral legs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.303 – Unspecified atherosclerosis of unspecified type of bypass graft(s) of the extremities, bilateral legs
What it is
This code identifies atherosclerotic narrowing or blockage in bypass grafts supplying both legs, when the graft type is not specified. Use it when the record states graft atherosclerosis but does not name the graft material.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include reduced leg circulation, exertional leg pain, diminished pulses, or graft-related ischemic symptoms noted on vascular exam or imaging.
When to use this code
Use this code when the provider documents atherosclerosis affecting bypass grafts in both lower extremities and does not specify the graft type. It also fits when laterality is bilateral and the record supports extremity graft involvement. Check documentation if the note only mentions peripheral arterial disease without graft disease.
Do not use for
Do not use it for native artery atherosclerosis, single-leg disease, or when the graft type is documented more specifically and a more precise code applies. Check documentation if the condition is described as occlusion, stenosis, or graft failure without atherosclerosis.
Coding tip
Match laterality and graft type exactly; if either is missing, query the provider or code the documented unspecified detail.