ICD-10 Code I70.638 – Atherosclerosis of nonbiological bypass graft(s) of the right leg with ulceration of other part of lower leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.638 – Atherosclerosis of nonbiological bypass graft(s) of the right leg with ulceration of other part of lower leg
What it is
This code identifies atherosclerotic narrowing or blockage in a nonbiological bypass graft in the right leg, with an associated ulcer on another part of the lower leg. Use it when the graft disease and ulcer location are documented together.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include reduced limb perfusion, pain, delayed wound healing, and a documented ulcer on the lower leg with graft atherosclerosis.
When to use this code
Use this code when the record clearly states atherosclerosis involving a nonbiological bypass graft in the right leg and an ulcer on another part of the lower leg. The ulcer site should not be the foot or ankle unless documented that way. Check documentation for laterality and ulcer location.
Do not use for
Do not use this code if the bypass graft is biological, if the affected leg is not the right leg, or if the ulcer location is different. Do not assign it when the chart only mentions peripheral arterial disease without graft involvement.
Coding tip
Verify graft type, laterality, and exact ulcer site before coding; missing one element can point you to a different ICD-10-CM code.