ICD-10 Code I70.339 – Atherosclerosis of unspecified type of bypass graft(s) of the right leg with ulceration of unspecified site (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.339 – Atherosclerosis of unspecified type of bypass graft(s) of the right leg with ulceration of unspecified site
What it is
This code identifies atherosclerotic disease affecting an unspecified bypass graft in the right leg, with an associated ulcer at an unspecified site. Use it when the record links the graft disease and ulceration.
Clinical signs
Clinical features may include reduced leg perfusion, graft-related ischemic symptoms, and a documented ulcer on the right lower extremity. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents atherosclerosis in a bypass graft of the right leg and also documents ulceration, but does not specify the ulcer site. It is appropriate when the graft type is not identified in the note. Check documentation if the side, graft type, or ulcer location is clearer.
Do not use for
Do not use this code for atherosclerosis without ulceration, or for ulcers unrelated to the bypass graft disease. Do not use it if the record specifies a different limb or a more specific graft type and site.
Coding tip
Confirm that both the bypass graft atherosclerosis and the ulcer are documented together before assigning I70.339.