I70.799

HCC Category Mapping

What This Code Means

This code describes a buildup of plaque in a surgically placed bypass graft in the legs or arms that doesn't fit into other specific categories. It's used when the exact location or type of bypass graft isn't specified.

Coding Tips

• •Verify documentation specifies this is atherosclerosis of a bypass graft rather than native vessel disease, as this significantly impacts code selection
• •If the extremity location (left, right, or bilateral) is documented, use a more specific code (I70.791, I70.792, or I70.793) instead of the unspecified code I70.799

Clinical Significance

Other atherosclerosis of other type bypass graft of the extremities (unspecified extremity) captures peripheral arterial disease manifestations in bypass grafts that do not fit the specific categories of claudication, rest pain, ulceration, or gangrene. This may include findings such as bypass graft stenosis, diminished pulses through the graft, or other documented atherosclerotic changes not yet causing limb-threatening ischemia. While less severe than rest pain or tissue loss, this still represents significant vascular disease requiring ongoing surveillance and management.

Documentation Requirements

• ✓Documented atherosclerotic disease of other type bypass graft(s) with manifestation other than claudication, rest pain, ulceration, or gangrene
• ✓Laterality documented: unspecified extremity
• ✓Type of bypass graft specified (synthetic, composite, or other non-vein/non-biological type)
• ✓Specific findings described (graft stenosis, abnormal vascular studies, diminished graft flow)
• ✓Current management plan (surveillance imaging, antiplatelet therapy, consideration for revision)

Commonly Confused Codes