I70.535

HCC Category Mapping

What This Code Means

This code describes a condition where fatty deposits have built up in a man-made biological bypass graft in the right leg, causing the graft to narrow or harden, and this has led to an open sore or ulcer on another part of the foot. This typically occurs in patients who have had vascular surgery to improve blood flow in the leg.

Coding Tips

• •Verify the graft type is specifically nonautologous biological (not the patient's own tissue) and confirm it is in the right leg with ulceration documented on the foot
• •Ensure documentation specifies the exact location of the ulceration on the foot (other part, not heel or toe) and link it to the atherosclerotic graft disease for accurate code selection

Clinical Significance

This code identifies atherosclerosis of a nonautologous biological bypass graft with ulceration, representing advanced peripheral arterial disease where compromised blood flow has caused tissue breakdown. Ulceration in the setting of bypass graft atherosclerosis indicates graft failure or progression of disease beyond the graft, requiring aggressive wound care and potential revascularization. This diagnosis carries significant implications for patient morbidity and healthcare resource consumption.

Documentation Requirements

• ✓Documentation of the type of bypass graft as nonautologous biological (must distinguish from autologous vein, nonautologous biological, or synthetic/nonbiological grafts)
• ✓Clinical evidence of atherosclerosis affecting the bypass graft (imaging, angiography, or clinical assessment)
• ✓Description of the ulcer including location, size, depth, and wound bed characteristics
• ✓Documentation linking the ulceration to the atherosclerotic bypass graft disease
• ✓Vascular assessment results confirming arterial insufficiency as the cause
• ✓Clear documentation of laterality specifying the right leg

Commonly Confused Codes