Acute embolism and thrombosis of left subclavian vein

This code signifies the sudden blockage of the left subclavian vein by an embolus (a traveling clot) or a thrombus (a stationary clot). This condition can lead to acute venous congestion, swelling, and pain in the left arm and shoulder. It represents an urgent vascular event requiring prompt medical attention.

Use this code when documentation explicitly states an acute embolism or thrombosis affecting the left subclavian vein. This diagnosis is typically supported by imaging studies such as ultrasound, venography, or CT venography confirming the presence and location of the clot. It applies to new or recent onset events, not chronic conditions.

• Ensure documentation specifies "acute" to differentiate from chronic conditions.
• Verify the laterality is clearly documented as "left" subclavian vein.
• Distinguish from arterial embolisms/thromboses, which have different code ranges.