I70.728

HCC Category Mapping

What This Code Means

Hardening and narrowing of a bypass graft in an extremity other than the legs (such as arm) causing pain at rest.

Coding Tips

• •Document which extremity is affected when the location is not a standard leg location
• •Verify this code is used only when the affected extremity is not the right leg, left leg, or bilateral legs

Clinical Significance

Atherosclerosis of other type bypass grafts with rest pain (other extremity) represents advanced peripheral arterial disease (Fontaine Stage III/Rutherford Category 4) where ischemia is severe enough to cause pain even without exertion. This indicates critical limb ischemia that carries high risk for tissue loss and amputation. Risk adjustment captures this as significant vascular disease reflecting expected resource utilization for vascular surveillance, potential revascularization, and wound prevention.

Documentation Requirements

• ✓Documented atherosclerotic disease of bypass graft(s) — specify graft type (must be 'other type' bypass graft, not autologous vein or nonautologous biological)
• ✓Rest pain explicitly stated — pain at rest in the affected extremity, not just claudication with exertion
• ✓Laterality documented: other extremity
• ✓Type of bypass graft documented (e.g., synthetic, composite, or other non-vein/non-biological graft)
• ✓Ankle-brachial index (ABI) or other vascular study results supporting diagnosis when available
• ✓Current treatment plan (e.g., antiplatelet therapy, pain management, vascular surgery consult)

Commonly Confused Codes