See ICD-9's embolism coding changes at a glance. • 416.2 -- Chronic pulmonary embolism. NEW: Chronic, Deep Vessels, Lower Extremity • 453.50 -- Chronic venous embolism and thrombosis of unspecified deep vessels of lower extremity • 453.51 -- ... of deep vessels of proximal lower extremity • 453.52 -- ... of deep vessels of distal lower extremity. NEW: Superficial Vessels • 453.6 -- Venous embolism and thrombosis of superficial vessels of lower extremity. NEW: Chronic, Upper Extremity and Thoracic • 453.71 -- Chronic venous embolism and thrombosis of superficial veins of upper extremity • 453.72 -- ... of deep veins of upper extremity • 453.73 -- ...of upper extremity, unspecified • 453.74 -- ... axillary veins • 453.75 -- ... of subclavian veins • 453.76 -- ... of internal jugular veins • 453.77 -- ... of other thoracic veins • 453.79 -- ... of other specified veins. NEW: Acute, Upper Extremity and Thoracic • 453.81 -- Acute venous embolism and thrombosis of superficial veins of upper extremity • 453.82 -- ... of deep veins of upper extremity • 453.83 -- ... of upper extremity, unspecified • 453.84 -- ... of axillary veins • 453.85 -- ... of subclavian veins • 453.86 -- ... of internal jugular veins • 453.87 -- ... of other thoracic veins • 453.89 -- ... of other specified veins. REVISED: Acute, Lower Extremity • 453.40 -- Acute venous embolism and thrombosis of unspecified deep vessels of lower extremity • 453.41 -- ... of deep vessels of proximal lower extremity • 453.42 -- ... of deep vessels of distal lower extremity. DELETED: Other • 453.8 -- Other venous embolism and thrombosis of other specified veins.