ICD-10 Code I70.633 – Atherosclerosis of nonbiological bypass graft(s) of the right leg with ulceration of ankle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.633 – Atherosclerosis of nonbiological bypass graft(s) of the right leg with ulceration of ankle
What it is
This code identifies atherosclerosis affecting a nonbiological bypass graft in the right leg, with an ulcer present at the ankle. It captures both the graft disease and the associated ulceration.
Clinical signs
Findings may include reduced graft patency, poor distal circulation, and a documented ankle ulcer on the right side. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record states atherosclerosis of a nonbiological bypass graft in the right leg and specifies ulceration of the ankle. You should confirm the ulcer location and laterality in the note. If the 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 at a different site. Check documentation if the graft is biological or if ulceration is not documented.
Coding tip
Verify both the graft type and the exact ulcer location before assigning I70.633.