ICD-10 Code I70.513 – Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with intermittent claudication, bilateral legs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.513 – Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with intermittent claudication, bilateral legs
What it is
This code identifies atherosclerotic narrowing in a nonautologous biological bypass graft in the leg arteries, with intermittent claudication affecting both legs. Use it when the graft itself is documented as the diseased vessel.
Clinical signs
Typical findings include exertional leg pain that improves with rest, consistent with intermittent claudication. Clinical features vary; refer to documentation for graft type, laterality, and whether symptoms are bilateral.
When to use this code
Use I70.513 when the provider documents atherosclerosis of a nonautologous biological bypass graft in the extremities and specifically notes intermittent claudication in both legs. The record should support that the bypass graft, not the native artery, is the affected site.
Apply it for postoperative or follow-up encounters when the graft remains patent but is narrowed by atherosclerotic disease. Check documentation if the laterality is unclear or if claudication is absent.
Do not use for
Do not use this code for native artery atherosclerosis, graft occlusion without atherosclerosis, or claudication without documented bilateral involvement. Check documentation if the bypass material is not biological.
Coding tip
Confirm both the graft type and bilateral claudication in the note before assigning I70.513.