ICD-10 Code I70.548 – Atherosclerosis of nonautologous biological 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 I70.548 – Atherosclerosis of nonautologous biological bypass graft(s) of the left leg with ulceration of other part of lower leg
What it is
This code identifies atherosclerotic narrowing or blockage in a nonautologous biological bypass graft in the left leg, with an associated ulcer on another part of the lower leg. Use it when the graft and ulcer are both documented.
Clinical signs
Clinical features vary; refer to documentation. You may see evidence of peripheral arterial disease in the grafted limb plus a documented ulcer on the lower leg, with impaired healing or ischemic skin changes.
When to use this code
Use this code when the provider documents atherosclerosis affecting a nonautologous biological bypass graft in the left leg and also documents an ulcer of another part of the lower leg. The ulcer location must match the record, and the left-sided graft involvement must be clear. Check documentation if the graft type or ulcer site is unclear.
Do not use for
Do not use this code for native-vessel peripheral artery disease without a bypass graft. Also avoid it if the ulcer is not documented or if the graft is autologous, prosthetic, or on a different limb.
Coding tip
Confirm both the graft type and the ulcer site in the chart before assigning I70.548.