I70.662
BillableAtherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene, left leg
HCC Category Mapping
V28HCC 263 — Atherosclerosis of the Extremities with Ulceration or Gangrene
0.742V24HCC 106 — Atherosclerosis of the Extremities with Ulceration or Gangrene
0.860ESRDHCC 106 — Atherosclerosis of the Extremities with Ulceration or Gangrene
0.000What This Code Means
Hardening of arteries in a synthetic bypass graft in the left leg with tissue death (gangrene).
Coding Tips
- •Confirm documentation specifies gangrene and left leg laterality to distinguish from right leg codes
- •Gangrene indicates severe vascular compromise and potential need for amputation
Clinical Significance
This code captures atherosclerosis affecting nonbiological (synthetic) bypass graft(s) of the extremities complicated by gangrene in the left lower extremity, representing the most severe stage of peripheral arterial disease (Fontaine Stage IV/Rutherford Category 5-6). Gangrene in bypass graft atherosclerosis indicates critical limb ischemia with tissue death, carrying high risk for amputation, sepsis, and mortality. This diagnosis significantly impacts risk adjustment due to the intensive surgical, wound care, and vascular management required.
Documentation Requirements
- ✓Confirmed diagnosis of atherosclerosis affecting nonbiological (synthetic) bypass graft(s)
- ✓Type of bypass graft material documented (synthetic/nonbiological vs. other type such as composite or mixed-material graft)
- ✓Laterality clearly documented (left lower extremity)
- ✓History of bypass graft surgery with approximate date or timeframe
- ✓Current status and monitoring plan for the bypass graft
- ✓Documentation of gangrene: location, extent, wet vs. dry, and tissue involvement
- ✓Vascular studies (ankle-brachial index, duplex ultrasound, or angiography) confirming critical ischemia
- ✓Wound care plan and surgical consultation documentation
- ✓Assessment of amputation risk and level if applicable
Commonly Confused Codes
I70.561-I70.569 — Atherosclerosis of nonautologous biological bypass graft with gangrene; different graft material (cadaveric vein, bovine)I70.461-I70.469 — Atherosclerosis of autologous vein bypass graft with gangrene; for patient's own vein graft (e.g., saphenous vein)I70.361-I70.369 — Atherosclerosis of unspecified bypass graft with gangrene; use only when graft type is unknownI70.261-I70.269 — Atherosclerosis of native arteries with gangrene; for disease in native vessels, not graftsI70.761-I70.769 — Atherosclerosis of other type of bypass graft with gangrene; for composite or other non-standard graft materialsI96 — Gangrene, not elsewhere classified; do not use when the gangrene is specified as atherosclerotic
Code Hierarchy
└I70Atherosclerosis└I70.6Atherosclerosis of nonbiological bypass graft(s) of the extremities└I70.66Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene└I70.662Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene, left leg
└I70.662Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene, left leg