ICD-10 Code I70.34 – Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.34 – Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration
What it is
This code identifies atherosclerotic narrowing or blockage in an unspecified bypass graft in the left leg, with an associated ulcer. Use it when the documentation links the ulcer to the graft disease.
Clinical signs
Findings may include poor leg circulation, diminished pulses, ischemic skin changes, and a nonhealing ulcer on the left leg. Clinical features vary; refer to documentation.
When to use this code
Use I70.34 when the provider documents atherosclerosis affecting an unspecified bypass graft in the left leg and also documents ulceration. The record should support both the vascular disease and the ulcer relationship. If the graft type is specified, verify whether a more specific code applies.
Do not use for
Do not use this code for atherosclerosis without ulceration or when the ulcer is unrelated to the graft disease. Check documentation if the bypass graft type or laterality is unclear.
Coding tip
Confirm that the ulcer is attributed to the bypass graft disease and that the left leg laterality is documented before assigning I70.34.