I70.742

HCC Category Mapping

What This Code Means

Hardening of arteries in a bypass graft in the left leg with an open sore on the calf.

Coding Tips

• •Confirm the ulceration is on the calf (lower leg between knee and ankle) rather than other leg locations.
• •Document the depth and severity of the ulcer, as this may require additional codes for wound care complexity.

Clinical Significance

Atherosclerosis of other type bypass graft of the left leg with ulceration of the calf represents advanced peripheral arterial disease with active tissue loss (Fontaine Stage IV). Ulceration from arterial insufficiency through a bypass graft indicates graft dysfunction or progression of atherosclerotic disease, carrying substantial risk for limb loss. Accurate coding captures the complexity of managing combined graft disease with wound care needs, ensuring appropriate risk adjustment and care planning.

Documentation Requirements

• ✓Documented atherosclerotic disease specifically of other type bypass graft(s) in the left leg
• ✓Active ulceration at the calf clearly described — including size, depth, and wound characteristics
• ✓Laterality confirmed as left leg
• ✓Type of bypass graft specified (synthetic, composite, or other non-vein/non-biological type)
• ✓Severity/classification of ulcer documented (e.g., Wagner grade, wound staging)
• ✓Additional code from L97.- or L98.49- to specify ulcer severity
• ✓Current wound care regimen and vascular management plan documented
• ✓Vascular studies or perfusion assessment results when available

Commonly Confused Codes