ICD-10 Code I70.442 – Atherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration of calf (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.442 – Atherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration of calf
What it is
This code identifies atherosclerotic narrowing or blockage in an autologous vein bypass graft in the left leg, with an ulcer on the calf. Use it when the graft disease and the ulcer are both documented.
Clinical signs
Findings may include poor limb perfusion, leg pain or claudication, and a nonhealing calf ulcer. Clinical features vary; refer to documentation, especially for graft type, laterality, and ulcer location.
When to use this code
Use I70.442 when the record states atherosclerosis affects an autologous vein bypass graft in the left leg and an ulcer is present on the calf. You should code the documented ulcer site exactly as recorded. Verify that the bypass graft is autologous vein, not prosthetic or another conduit.
Do not use for
Do not use this code if the ulcer is on a different site, the graft type is not autologous vein, or atherosclerosis is not documented. Check documentation for any separate acute limb ischemia or infection codes.
Coding tip
Confirm laterality, graft material, and ulcer location in the operative note or vascular assessment before assigning the code.