I70.438

HCC Category Mapping

What This Code Means

Hardening of arteries in a vein graft of the right leg with an open sore in another part of the lower leg (not thigh, calf, heel, or midfoot) due to poor blood circulation.

Coding Tips

• •Use this code for ulcerations in atypical lower leg locations not covered by more specific codes
• •Document the exact anatomical location of the ulcer for clarity

Clinical Significance

This code identifies atherosclerosis in autologous vein bypass grafts with ulceration of other part of lower leg, 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, other part of lower leg)
• ✓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