I82.429
BillableAcute embolism and thrombosis of unspecified iliac vein
HCC Category Mapping
V28HCC 267 — Vascular Disease
0.356V24HCC 108 — Vascular Disease
0.297ESRDHCC 108 — Vascular Disease
0.000RxHCCHCC 215 — Pulmonary Embolism and Other Vascular Disease
0.000What This Code Means
A blood clot that suddenly forms in a pelvic vein (iliac vein), but the specific side (right, left, or both) is not specified in the documentation.
Coding Tips
- •Use only when laterality cannot be determined from medical record
- •Query provider if possible to obtain specific laterality for more precise coding
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 documentation should be sought; if unavailable, document the reason laterality cannot be determined
- ✓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 thighI82.220/I82.221 — Inferior vena cava thrombosis; IVC is above the iliac bifurcationI74.5 — Embolism and thrombosis of iliac artery; arterial not venous occlusionI82.401-I82.409 — Unspecified deep vein DVT of lower extremity; use when specific vein is not identifiedI82.531-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└I82.429Acute embolism and thrombosis of unspecified iliac vein
└I82.429Acute embolism and thrombosis of unspecified iliac vein