ICD-10 Code I70.342 – Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration of calf (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.342 – Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration of calf
What it is
This code identifies atherosclerosis affecting an unspecified bypass graft in the left leg, with an ulcer located on the calf. Use it when the record documents both the graft disease and the ulceration.
Clinical signs
Findings may include diminished blood flow in the grafted limb, poor wound healing, and a calf ulcer consistent with ischemia. Clinical features vary; refer to documentation.
When to use this code
Use I70.342 when the provider documents atherosclerosis in a bypass graft of the left leg and specifically links it to a calf ulcer. The ulcer location must be the calf, and the bypass graft type is not specified. Check documentation if laterality, graft site, or ulcer site is unclear.
Do not use for
Do not use this code for atherosclerosis without ulceration, or for ulcers in another location. If the record describes a different limb, a native artery, or a more specific graft type, select the documented code instead.
Coding tip
Verify that the ulcer is documented on the calf and that the left leg bypass graft disease is explicitly stated before assigning this code.