ICD-10 Code I70.312 – Atherosclerosis of unspecified type of bypass graft(s) of the extremities with intermittent claudication, left leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.312 – Atherosclerosis of unspecified type of bypass graft(s) of the extremities with intermittent claudication, left leg
What it is
This code identifies atherosclerotic narrowing in a bypass graft supplying an extremity, with intermittent claudication in the left leg. Use it when the graft type is not further specified and the documentation clearly links symptoms to the left leg.
Clinical signs
Typical findings include exertional leg pain that improves with rest, reduced walking tolerance, and evidence of peripheral arterial disease in the bypass graft. Clinical features vary; refer to documentation.
When to use this code
Use I70.312 when the record states atherosclerosis affects an unspecified bypass graft in an extremity and the patient has intermittent claudication in the left leg. It is appropriate when the provider documents the anatomic site and symptom together. Check documentation if laterality or graft type is unclear.
Do not use for
Do not use this code for claudication without documented atherosclerosis of a bypass graft, or for disease in the right leg or an unspecified leg. Do not use it if the graft is native vessel disease rather than bypass graft disease.
Coding tip
Confirm both the bypass graft involvement and left-leg claudication are documented before assigning this code.