Acute embolism and thrombosis of left iliac vein

This diagnosis code signifies a sudden blockage of the left iliac vein due to an embolus (a traveling clot) or a thrombus (a clot formed in situ). This acute event obstructs blood flow from the left lower extremity and pelvis, potentially leading to significant swelling, pain, and distal ischemia.

Assign this code when documentation clearly indicates an acute onset of an embolism or thrombosis specifically affecting the left iliac vein. Supporting documentation would include physician notes detailing the acute nature of the event, imaging reports (e.g., ultrasound, CT venography) confirming the presence and location of the clot, and laterality.

• Differentiate between acute and chronic conditions; this code is strictly for acute presentations.
• Ensure laterality is explicitly documented as "left"; avoid using this code for unspecified or right-sided iliac vein involvement.
• Verify the specific vein involved; do not confuse iliac vein thrombosis with femoral or other deep vein thromboses.