I72.4 ICD-10-CM Code: Aneurysm of artery of lower extremity

Code

I72.4

Description

Aneurysm of artery of lower extremity

HCC (V28)

No CMS-HCC V28 mapping

RAF reference coefficient

—

Billable

Yes

Payment year

2026

HCC Category Mapping

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work I72.4 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for I72.4

What This Code Means

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for I72.4 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

• •Specify laterality (right/left) and anatomical location (femoral, popliteal, etc.) if documented
• •Distinguish between ruptured and non-ruptured presentations

Clinical Significance

Aneurysm of a lower extremity artery, most commonly the popliteal artery, is clinically significant due to the high risk of distal embolization and acute limb ischemia. Popliteal aneurysms are the most common peripheral arterial aneurysm and frequently present with thrombotic or embolic complications rather than rupture. Accurate coding captures this vascular disease burden requiring ongoing surveillance.

Documentation Requirements

• ✓Identification of specific lower extremity artery (femoral, popliteal, tibial)
• ✓Imaging confirmation with size measurement
• ✓Laterality (right, left, or bilateral)
• ✓Assessment of distal perfusion and runoff vessels
• ✓Presence or absence of mural thrombus
• ✓Treatment plan (surveillance, anticoagulation, surgical bypass, or endovascular repair)

Commonly Confused Codes

• •I72.1: Aneurysm of artery of upper extremity: different extremity
• •I72.3: Aneurysm of iliac artery: iliac arteries are pelvic, not lower extremity
• •I74.3: Embolism and thrombosis of arteries of the lower extremities: thromboembolic event rather than aneurysm itself
• •I70.2xx: Atherosclerosis of native arteries of extremities: stenotic disease, not aneurysmal

Child Codes