I82.529
BillableChronic 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 has formed and persists in one of the iliac veins (large veins in the pelvis), with the specific side not specified.
Coding Tips
- •Use this code only when the laterality (left, right, or bilateral) of the iliac vein thrombosis is not documented; if laterality is specified, use a more specific code.
- •This is a chronic condition code, so ensure documentation supports chronic rather than acute thrombosis.
Clinical Significance
Chronic iliac vein thrombosis represents a significant proximal deep vein thrombosis involving one of the largest veins draining the lower extremity into the inferior vena cava. Iliac vein involvement carries a higher risk of post-thrombotic syndrome, chronic venous insufficiency, and recurrent thromboembolism compared to more distal locations. This diagnosis captures substantial vascular disease burden and typically requires long-term anticoagulation and possible interventional management.
Documentation Requirements
- ✓Provider documentation explicitly stating 'chronic' deep vein thrombosis (not assumed from duration of treatment)
- ✓Clinical evidence supporting the diagnosis such as duplex ultrasound, venography, or other imaging results
- ✓Specific vein location documented (e.g., iliac)
- ✓Query provider for laterality (right, left, or bilateral) when not documented
- ✓Current treatment plan including anticoagulation therapy and duration
- ✓Assessment and monitoring notes demonstrating the condition is being actively managed
- ✓Documentation of chronicity such as 'chronic,' 'old,' 'long-standing,' or history of prior acute deep vein thrombosis that has transitioned to chronic status
Commonly Confused Codes
I82.429 — Acute embolism and thrombosis of iliac vein; ensure chronicity is clearly documentedI82.51- — Chronic embolism and thrombosis of femoral vein; the femoral vein is more distal than the iliac; verify exact veinI82.50- — Chronic embolism and thrombosis of unspecified deep veins; use the iliac-specific code when documentation names the iliac veinI82.89- — Chronic embolism and thrombosis of other specified veins; do not use for iliac vein when a specific code exists
Code Hierarchy
└I82Other venous embolism and thrombosis└I82.5Chronic embolism and thrombosis of deep veins of lower extremity└I82.52Chronic embolism and thrombosis of iliac vein└I82.529Chronic embolism and thrombosis of unspecified iliac vein
└I82.529Chronic embolism and thrombosis of unspecified iliac vein