I70.761

HCC Category Mapping

What This Code Means

This code describes a serious condition where fatty deposits have built up in a surgical bypass graft in the right leg, causing tissue death (gangrene) due to lack of blood flow. This is a life-threatening complication requiring urgent medical intervention.

Coding Tips

• •Verify the specific location (right leg) and confirm gangrene is documented before assigning this code, as it significantly impacts severity and treatment decisions
• •Ensure the bypass graft type is identified in the medical record; if the graft type is unspecified, use the 'other type' designation (761) rather than assuming a specific graft type

Clinical Significance

Atherosclerosis of other type bypass graft with gangrene of the right leg represents the most severe stage of peripheral arterial disease (Fontaine Stage IV with tissue necrosis). Gangrene indicates irreversible tissue death from critical ischemia, carrying high risk for major amputation, sepsis, and mortality. This is a high-acuity condition requiring urgent vascular intervention, aggressive wound management, and often surgical amputation, making it one of the most impactful vascular HCC codes for risk adjustment.

Documentation Requirements

• ✓Gangrene explicitly documented in the right leg — wet or dry gangrene specified when possible
• ✓Atherosclerotic disease of other type bypass graft(s) confirmed as the underlying cause
• ✓Laterality documented: right leg
• ✓Type of bypass graft specified (synthetic, composite, or other non-vein/non-biological type)
• ✓Extent of gangrenous tissue described (digits, forefoot, limb segment)
• ✓Additional code(s) to identify severity of any associated ulceration (L97.-, L98.49-) when ulcers coexist
• ✓Treatment plan documented (amputation level, revascularization attempts, wound care, antibiotic therapy)
• ✓Vascular studies or surgical findings supporting the diagnosis

Commonly Confused Codes