I70.201

Billable

Unspecified atherosclerosis of native arteries of extremities, right leg

HCC Category Mapping

V24HCC 108 — Vascular Disease

0.297

ESRDHCC 108 — Vascular Disease

0.000

What This Code Means

This code describes a buildup of plaque in the arteries of the right leg that has not been further specified by the physician. The plaque narrows the blood vessels and can reduce blood flow to the leg.

Coding Tips

•Verify documentation specifies the right leg; if bilateral or unspecified, use different codes (I70.202 for left leg, I70.203 for bilateral)
•Review clinical notes for any documented complications (claudication, rest pain, ulceration, gangrene) as these require more specific codes from the I70.2 subcategory

Clinical Significance

Unspecified atherosclerosis of native arteries of the extremities indicates peripheral arterial disease without documentation of specific clinical manifestations such as claudication, rest pain, or ulceration. While this code captures the underlying vascular pathology, it represents the least specific classification and may understate disease severity if clinical symptoms are present but not coded. Peripheral arterial disease is a major predictor of cardiovascular morbidity and mortality and warrants aggressive risk factor modification and surveillance.

Documentation Requirements

✓Documentation of the specific arterial site affected by atherosclerosis
✓Specification that the atherosclerosis involves native (not grafted or bypassed) arteries
✓Documentation of the affected extremity and laterality when known
✓Ankle-brachial index or other vascular study results supporting the diagnosis
✓Query the provider regarding presence or absence of symptoms (claudication, rest pain, ulceration) to allow assignment of a more specific code
✓Cardiovascular risk factor documentation and treatment plan

Commonly Confused Codes

I70.21x — Atherosclerosis of native arteries of extremities with intermittent claudication; use when claudication symptoms are documented I70.22x — Atherosclerosis of native arteries of extremities with rest pain; use when rest pain is documented, indicating more severe disease I70.3x — Atherosclerosis of unspecified type of bypass graft of extremities; use when the affected vessel is a bypass graft, not a native artery I73.9 — Peripheral vascular disease, unspecified; a less specific code that does not specify atherosclerosis as the cause I70.0 — Atherosclerosis of aorta; use when the aorta is the affected vessel rather than the extremity arteries

Code Hierarchy

└I70Atherosclerosis └I70.2Atherosclerosis of native arteries of the extremities └I70.20Unspecified atherosclerosis of native arteries of extremities └I70.201Unspecified atherosclerosis of native arteries of extremities, right leg

└I70.201Unspecified atherosclerosis of native arteries of extremities, right leg