I82.421

Billable

Acute embolism and thrombosis of right iliac vein

HCC Category Mapping

V28HCC 267 — Vascular Disease

0.356

V24HCC 108 — Vascular Disease

0.297

ESRDHCC 108 — Vascular Disease

0.000

RxHCCHCC 215 — Pulmonary Embolism and Other Vascular Disease

0.000

What This Code Means

A blood clot that suddenly forms in the right pelvic vein (iliac vein), blocking blood flow in the right lower abdomen and leg.

Coding Tips

•Iliac vein thrombosis is more proximal than femoral; verify correct vessel in documentation
•Confirm right side is specified; use I82.422 for left or I82.423 for bilateral

Clinical Significance

Acute iliac vein thrombosis is a proximal deep vein thrombosis involving the pelvic veins, carrying the highest risk of pulmonary embolism among lower extremity deep vein thrombosis. These patients often require aggressive intervention including catheter-directed thrombolysis, IVC filter consideration, and intensive anticoagulation. This diagnosis reflects critical vascular disease severity important for accurate risk stratification.

Documentation Requirements

✓Clinical diagnosis of venous thrombosis or thrombophlebitis clearly documented by the treating provider
✓Diagnostic confirmation via duplex ultrasonography, CT venography, MR venography, or venography with imaging findings described
✓Current treatment plan including anticoagulation regimen with specific medication, dose, and duration
✓Documentation of acute onset with date of symptom onset or diagnosis establishing the acute nature
✓Laterality (right or left) clearly specified in provider documentation
✓Assessment of risk factors (immobility, recent surgery, malignancy, hypercoagulable state, oral contraceptive use)

Commonly Confused Codes

I82.411-I82.419 — Femoral vein thrombosis; femoral veins are distal to iliac veins in the thigh I82.220/I82.221 — Inferior vena cava thrombosis; IVC is above the iliac bifurcation I74.5 — Embolism and thrombosis of iliac artery; arterial not venous occlusion I82.401-I82.409 — Unspecified deep vein DVT of lower extremity; use when specific vein is not identified I82.531-I82.539 — Chronic embolism of iliac vein; verify acute vs. chronic presentation

Code Hierarchy

└I82Other venous embolism and thrombosis └I82.4Acute embolism and thrombosis of deep veins of lower extremity └I82.42Acute embolism and thrombosis of iliac vein └I82.421Acute embolism and thrombosis of right iliac vein

└I82.421Acute embolism and thrombosis of right iliac vein