ICD-10 Code I70.349 – Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration of unspecified site (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.349 – Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration of unspecified site
What it is
This code identifies atherosclerotic narrowing or blockage in a bypass graft supplying the left leg, with an associated ulcer but no site specified. Use it when documentation confirms the graft disease and ulceration.
Clinical signs
Findings may include diminished limb perfusion, pain, or poor wound healing in the left leg. Clinical features vary; refer to documentation for the graft type and ulcer location.
When to use this code
Use I70.349 when the record states atherosclerosis affecting an unspecified bypass graft in the left leg and an ulcer is present, but the ulcer site is not documented. It is appropriate for postoperative vascular graft disease with ulceration. If the graft type or ulcer site is specified, code more precisely when supported.
Do not use for
Do not use this code for native artery atherosclerosis without a bypass graft, or when the ulcer is clearly documented at a different site. Check documentation if the graft laterality, graft type, or ulcer location is uncertain.
Coding tip
Verify both the bypass graft laterality and the presence of ulceration before assigning this code.