ICD-10 Code I70.448 – Atherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration of other part of lower leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.448 – Atherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration of other part of lower leg
What it is
This code identifies hardening and narrowing of an autologous vein bypass graft in the left leg, with an associated ulcer on another part of the lower leg. Use it when the graft is the diseased vessel and the ulcer is documented.
Clinical signs
Findings may include reduced blood flow in the bypass graft and a nonhealing ulcer on the lower leg. Clinical features vary; refer to documentation for graft status, ulcer location, and any laterality details.
When to use this code
Use this code when the record clearly states atherosclerosis affecting an autologous vein bypass graft in the left leg and also documents ulceration of another part of the lower leg. You should code the ulcer only when the site is specified and linked to the condition.
Choose this code for postoperative vascular patients with documented graft disease, not for native-vessel peripheral arterial disease alone. If the ulcer site or graft type is unclear, check documentation before assigning the code.
Do not use for
Do not use it for ulcers without documented graft atherosclerosis, or for atherosclerosis of a native artery instead of a bypass graft. Check documentation if the graft type or ulcer location is not specified.
Coding tip
Verify that the bypass graft is autologous vein and that the ulcer is in the lower leg, because laterality and site drive correct code selection.