I80.212

Billable

Phlebitis and thrombophlebitis of left 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

This code describes inflammation and blood clot formation in the left iliac vein, which is a major vein in the lower abdomen and pelvis. This condition can cause pain, swelling, and redness in the lower left abdomen and leg.

Coding Tips

•Verify laterality is documented as 'left' in the medical record before assigning this code; if bilateral or right-sided, use different codes (I80.211 for right, I80.213 for bilateral)
•Determine if this is a superficial or deep vein thrombophlebitis, as deep vein involvement (DVT) requires more specific coding and clinical management documentation

Clinical Significance

Phlebitis and thrombophlebitis of the left iliac vein represents proximal deep vein thrombosis in one of the largest deep veins, carrying high risk for significant pulmonary embolism. Iliac vein thrombosis often involves more extensive clot burden than distal deep vein thrombosis and may be associated with May-Thurner syndrome or pelvic pathology. This represents a high-acuity vascular condition requiring aggressive anticoagulation and potential interventional radiology involvement.

Documentation Requirements

✓Imaging confirmation (CT venography, magnetic resonance venography, or duplex ultrasound with iliac visualization)
✓Laterality — left iliac vein documented
✓Assessment for May-Thurner syndrome or external compression
✓Evaluation for concurrent pulmonary embolism
✓Anticoagulation plan and consideration for catheter-directed thrombolysis or inferior vena cava filter
✓Underlying risk factors including pelvic malignancy, recent surgery, or thrombophilia
✓Acuity — acute vs. chronic with any post-thrombotic changes

Commonly Confused Codes

I80.10-I80.13 — Femoral vein thrombophlebitis: different, more distal vein I82.42x — Acute embolism and thrombosis of iliac vein: verify correct code series for the clinical context I80.20x — Unspecified deep vessels: less specific; use I80.21x when iliac vein is documented I87.1 — Compression of vein: use for external compression without thrombosis

Code Hierarchy

└I80Phlebitis and thrombophlebitis └I80.2Phlebitis and thrombophlebitis of other and unspecified deep vessels of lower extremities └I80.21Phlebitis and thrombophlebitis of iliac vein └I80.212Phlebitis and thrombophlebitis of left iliac vein

└I80.212Phlebitis and thrombophlebitis of left iliac vein