Acute embolism and thrombosis of unspecified subclavian vein

This code signifies the sudden blockage of an unspecified subclavian vein due to a blood clot. This acute event obstructs blood flow from the upper extremity and head/neck region back to the heart. It is a form of deep vein thrombosis (DVT) occurring in a major central vein.

Use this code when documentation clearly indicates an acute (sudden onset) thrombotic or embolic event affecting the subclavian vein, and the specific laterality (right or left) is not specified. This diagnosis is typically supported by imaging studies such as ultrasound, CT venography, or MRI, confirming the presence of a thrombus.

• Ensure the documentation specifies "acute" to differentiate from chronic conditions.
• Avoid using this code if the laterality (right or left subclavian vein) is documented; instead, use the more specific codes.
• Consider sequencing this code as a primary diagnosis if it is the reason for the encounter or hospitalization.