ICD-10 Code I70.439 – Atherosclerosis of autologous vein bypass graft(s) of the right leg with ulceration of unspecified site (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.439 – Atherosclerosis of autologous vein bypass graft(s) of the right leg with ulceration of unspecified site
What it is
This code identifies atherosclerotic narrowing or blockage in an autologous vein bypass graft in the right leg, with an associated ulcer at an unspecified site. Use it when the graft and ulcer are both documented.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include reduced graft perfusion, limb ischemia, and a documented ulcer on the right leg or foot related to the bypass disease.
When to use this code
Use I70.439 when the provider documents atherosclerosis affecting an autologous vein bypass graft in the right leg and also documents ulceration, but the ulcer site is not specified. The record should support that the graft is autologous vein and that the right leg is involved.
Choose this code when the ulcer is part of the coded condition, not a separate unrelated wound. Check documentation if the graft type, laterality, or ulcer location is unclear.
Do not use for
Do not use this code for native artery atherosclerosis without a bypass graft, or for grafts in the left leg or unspecified leg. Do not use it if ulceration is absent or if the ulcer site is clearly documented elsewhere.
Coding tip
Verify three elements in the chart: autologous vein graft, right leg, and ulceration; if any element is missing, check documentation before coding.