Acute embolism and thrombosis of superior vena cava

This code signifies the sudden blockage of the superior vena cava (SVC) due to an embolus (traveling clot) or a thrombus (stationary clot). This obstruction impedes blood flow from the head, neck, and upper extremities back to the heart, leading to characteristic symptoms.

Use this code for patients presenting with acute onset of SVC syndrome symptoms, such as facial swelling, dyspnea, and dilated neck veins, where imaging (e.g., CT venography, MRI) confirms an acute embolism or thrombosis of the SVC. Documentation should clearly specify the acute nature and the vessel involved.

• Distinguish between acute and chronic SVC obstruction; this code is specifically for acute events.
• Ensure documentation specifies the superior vena cava, as other venous thromboses have different codes.
• Consider sequencing this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if it's a complication of another condition.