ICD-10 Code I70.533 – Atherosclerosis of nonautologous biological bypass graft(s) of the right leg with ulceration of ankle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.533 – Atherosclerosis of nonautologous biological bypass graft(s) of the right leg with ulceration of ankle
What it is
This code describes atherosclerosis affecting a nonautologous biological bypass graft in the right leg, with an ulcer located at the ankle. It indicates reduced blood flow through the graft and associated tissue breakdown.
Clinical signs
Findings may include poor distal perfusion, a chronic ankle ulcer, and signs of peripheral arterial disease. Clinical features vary; refer to documentation for graft type, laterality, and ulcer location.
When to use this code
Use I70.533 when the record clearly documents atherosclerosis in a nonautologous biological bypass graft of the right leg and an ulcer at the ankle. You should also confirm that the ulcer is linked to the vascular disease rather than another cause. If the note does not specify the graft material or exact ulcer site, check documentation.
Do not use for
Do not use this code for ulcers without documented atherosclerosis of the bypass graft, or when the graft is autologous or synthetic. Do not assign it if the ulcer location is not the ankle.
Coding tip
Verify both laterality and graft type in the operative or vascular note before coding.