ICD-10 Code I70.631 – Atherosclerosis of nonbiological bypass graft(s) of the right leg with ulceration of thigh (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.631 – Atherosclerosis of nonbiological bypass graft(s) of the right leg with ulceration of thigh
What it is
This code identifies atherosclerotic narrowing or blockage in a nonbiological bypass graft in the right leg, with an ulcer located on the thigh. Use it when the graft disease and ulcer are both documented.
Clinical signs
Findings may include diminished limb perfusion, graft-related ischemic symptoms, and a documented ulcer on the thigh. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents atherosclerosis affecting a nonbiological bypass graft in the right leg and specifies ulceration of the thigh. It fits postoperative vascular graft disease with a related ulcer in the same limb. If the ulcer site or graft type is unclear, check documentation.
Do not use for
Do not use this code for native artery atherosclerosis without graft involvement, or for ulcers not linked to the documented right-leg bypass graft. Check documentation if laterality or ulcer location is missing.
Coding tip
Confirm the graft is nonbiological and that the ulcer is documented on the thigh before assigning I70.631.