ICD-10 Code I70.742 – Atherosclerosis of other type of bypass graft(s) of the left leg with ulceration of calf (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.742 – Atherosclerosis of other type of bypass graft(s) of the left leg with ulceration of calf
What it is
This code identifies plaque buildup in a bypass graft in the left leg, with an ulcer on the calf. Use it when documentation links the graft disease and the ulceration together.
Clinical signs
Clinical findings may include a nonhealing calf ulcer, reduced blood flow, and signs of peripheral arterial disease. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record states atherosclerosis affects an “other type” bypass graft in the left leg and the patient has calf ulceration. It is appropriate when the ulcer is documented as associated with the graft disease. Check documentation if the laterality, graft type, or ulcer site is unclear.
Do not use for
Do not use this code for ulcers without documented graft atherosclerosis or for disease in a different limb. Do not use it if the record does not specify the left leg or calf.
Coding tip
Verify the exact graft type, laterality, and ulcer location before assigning I70.742.