ICD-10 Code I70.449 – Atherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration of unspecified site (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.449 – Atherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration of unspecified site
What it is
This code identifies atherosclerotic narrowing or blockage in an autologous vein bypass graft in the left leg, with an associated ulcer at an unspecified site. It reflects disease in the graft itself, not just native leg arteries.
Clinical signs
Findings may include reduced limb perfusion, diminished pulses, graft-related ischemic symptoms, and a documented ulcer on the left leg. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly states atherosclerosis affecting an autologous vein bypass graft in the left leg and also documents an ulcer, but does not specify the ulcer site. You should code the documented laterality and graft type exactly as written. If the ulcer location is identified elsewhere, confirm whether a more specific code applies.
Do not use for
Do not use this code for atherosclerosis of native arteries, prosthetic bypass grafts, or bypass graft disease without ulceration. Check documentation if the ulcer is on a different limb or if the graft type is not autologous vein.
Coding tip
Verify both graft type and laterality in the operative or vascular note before assigning I70.449.