I70.609

Billable

Unspecified atherosclerosis of nonbiological bypass graft(s) of the extremities, unspecified extremity

HCC Category Mapping

V24HCC 108 — Vascular Disease

0.297

ESRDHCC 108 — Vascular Disease

0.000

What This Code Means

Hardening and narrowing of an artificial blood vessel graft (made from non-living material) in the legs or arms, without specific symptoms mentioned.

Coding Tips

•Use this code only when the specific extremity location and symptom status are not documented; query provider for more specificity if possible.
•This is the least specific code in this subcategory; always attempt to determine laterality and symptom presence for more accurate coding.

Clinical Significance

This code captures atherosclerosis affecting nonbiological (synthetic) bypass graft(s) of the extremities in the unspecified extremity without further specification of severity or manifestation. While this code captures the presence of atherosclerotic disease in bypass grafts, it lacks the clinical specificity of codes indicating claudication, rest pain, ulceration, or gangrene. Providers should be encouraged to document the specific clinical manifestation to support more precise coding and appropriate risk stratification.

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 (unspecified extremity)
✓History of bypass graft surgery with approximate date or timeframe
✓Current status and monitoring plan for the bypass graft
✓Clinical manifestation should be documented to support more specific coding when possible
✓Vascular assessment findings (pulses, ankle-brachial index, imaging results)

Commonly Confused Codes

I70.501-I70.509 — Unspecified atherosclerosis of nonautologous biological bypass graft; different graft material I70.401-I70.409 — Unspecified atherosclerosis of autologous vein bypass graft; for autologous vein grafts I70.301-I70.309 — Unspecified atherosclerosis of unspecified bypass graft; only when graft type is unknown I70.201-I70.209 — Unspecified atherosclerosis of native arteries; for native vessel disease without bypass grafts I70.701-I70.709 — Unspecified atherosclerosis of other type of bypass graft; for composite or non-standard grafts

Code Hierarchy

└I70Atherosclerosis └I70.6Atherosclerosis of nonbiological bypass graft(s) of the extremities └I70.60Unspecified atherosclerosis of nonbiological bypass graft(s) of the extremities └I70.609Unspecified atherosclerosis of nonbiological bypass graft(s) of the extremities, unspecified extremity

└I70.609Unspecified atherosclerosis of nonbiological bypass graft(s) of the extremities, unspecified extremity