I70.534

HCC Category Mapping

What This Code Means

This code describes a condition where fatty deposits have built up in a surgically placed biological bypass graft (made from non-human tissue) in the right leg, causing the graft to narrow or harden, and resulting in an open sore or ulcer on the heel or middle part of the foot.

Coding Tips

• •Verify documentation specifies the bypass graft is nonautologous (not from patient's own tissue) and biological in nature to distinguish from synthetic grafts
• •Confirm the ulceration location is documented as heel and/or midfoot, as different anatomical sites have different fifth character codes (this code ends in 4 for heel and midfoot specifically)

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