ICD-10 Code I70.31 – Atherosclerosis of unspecified type of bypass graft(s) of the extremities with intermittent claudication (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.31 – Atherosclerosis of unspecified type of bypass graft(s) of the extremities with intermittent claudication
What it is
This code identifies atherosclerotic narrowing in a bypass graft supplying an extremity, with leg pain or discomfort that appears during walking and improves with rest. Use it when the graft type is not specified.
Clinical signs
Typical findings include exertional limb pain, reduced walking tolerance, and evidence of peripheral arterial insufficiency in the grafted extremity. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record documents atherosclerosis affecting an unspecified bypass graft in an arm or leg and intermittent claudication is present. Confirm that the provider names the bypass graft rather than native vessels. If laterality or graft type is documented more specifically, choose the most precise code available.
Do not use for
Do not use this code for atherosclerosis of native arteries, graft occlusion without documented atherosclerosis, or bypass grafts without intermittent claudication. Check documentation.
Coding tip
Verify the extremity, graft status, and presence of claudication before assigning I70.31.