ICD-10 Code I70.443 – Atherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration of ankle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.443 – Atherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration of ankle
What it is
This code identifies atherosclerotic narrowing or blockage in an autologous vein bypass graft in the left leg, with an ulcer at the ankle. It tells you the bypass graft is affected and the ulcer is part of the documented condition.
Clinical signs
Typical findings include reduced blood flow through the graft, a nonhealing ankle ulcer, and signs of peripheral arterial disease. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents atherosclerosis in an autologous vein bypass graft of the left leg and also notes ulceration at the ankle. The record should link the ulcer to the vascular disease when that is the intended diagnosis. If the laterality, graft type, or ulcer site is unclear, check documentation.
Do not use for
Do not use this code for native artery atherosclerosis without a bypass graft, or for ulcers not documented as related to the graft disease. Do not assign it if the leg side or ulcer location does not match the record.
Coding tip
Verify graft type, laterality, and ulcer site in the provider note before coding I70.443.