I70.434

HCC Category Mapping

What This Code Means

Hardening of arteries in a vein graft of the right leg with an open sore on the heel or midfoot area due to poor blood circulation.

Coding Tips

• •This code specifically applies to heel and midfoot ulcerations; foot ulcers in other locations use different codes
• •Document the size and depth of the ulcer for comprehensive clinical assessment

Clinical Significance

This code identifies atherosclerosis in autologous vein bypass grafts with ulceration of heel and midfoot, indicating significant peripheral arterial insufficiency causing tissue breakdown. Ulceration complicating bypass graft atherosclerosis signals graft stenosis or failure with inadequate distal perfusion, requiring wound care management and potential revascularization. Accurate capture matters for risk adjustment as it reflects the progression from stable peripheral arterial disease to limb-threatening ischemia.

Documentation Requirements

• ✓Documentation of peripheral arterial disease or atherosclerosis affecting the bypass graft
• ✓Identification of graft type as autologous vein (if autologous vein is confirmed, document the vein source; if type is unknown, document it as unspecified)
• ✓Laterality clearly stated as right leg
• ✓Ulcer site specifically documented (in this case, heel and midfoot)
• ✓Ulcer severity, size, and depth documented (consider Wound, Ischemia, and foot Infection classification or similar staging)
• ✓Causal link between atherosclerotic graft disease and the ulceration must be established in the documentation
• ✓Current wound care plan and treatment documented
• ✓History of bypass graft surgery with date and indication when available

Commonly Confused Codes