Acute embolism and thrombosis of unspecified axillary vein

This code signifies the sudden blockage of an axillary vein, located in the armpit region, due to a blood clot or other embolic material. This acute event obstructs blood flow, potentially leading to swelling, pain, and functional impairment of the affected upper extremity.

Apply this code when documentation clearly indicates an acute, newly formed embolism or thrombosis affecting an axillary vein, without specifying laterality. This diagnosis is typically supported by imaging studies such as ultrasound or venography confirming the presence of a thrombus in the axillary vein.

• Ensure the documentation specifies "acute" to differentiate from chronic conditions.
• Avoid using this code if laterality (right or left) of the axillary vein is documented; use the more specific codes.
• Consider sequencing this code with codes for underlying causes or associated conditions, such as malignancy or hypercoagulable states.