ICD-10 Code I70.743 – Atherosclerosis of other type of bypass graft(s) of the left leg with ulceration of ankle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.743 – Atherosclerosis of other type of bypass graft(s) of the left leg with ulceration of ankle
What it is
This code identifies atherosclerotic narrowing or blockage in a nonautologous bypass graft in the left leg, with an ulcer located at the ankle. Use it when the record links the ulcer to the graft-related peripheral arterial disease.
Clinical signs
Typical findings include reduced blood flow in the left leg, a chronic or nonhealing ankle ulcer, and signs of peripheral arterial disease. Clinical features vary; refer to documentation for graft type, laterality, and ulcer site.
When to use this code
Use this code when documentation states atherosclerosis affects an “other type” bypass graft in the left leg and the patient has an ulcer of the ankle. You should also confirm that the ulcer is part of the documented arterial disease picture. If the note does not specify graft type or ulcer location, check documentation before assigning the code.
Do not use for
Do not use this code for native-vessel atherosclerosis, ulcers from venous, diabetic, or pressure causes, or bypass graft disease without ulceration. Check documentation if the ulcer is elsewhere or the graft type is not clearly stated.
Coding tip
Verify laterality, graft type, and ulcer site in the operative note or problem list before coding.