Chronic embolism and thrombosis of right subclavian vein

This code signifies the persistent presence of an occlusive or partially occlusive blood clot within the right subclavian vein. This condition can lead to symptoms such as arm swelling, pain, and discoloration due to impaired venous drainage. It represents a long-standing or recurrent thrombotic event rather than an acute occurrence.

Use this code for patients diagnosed with a non-acute, established thrombus or embolus in the right subclavian vein. Documentation should clearly indicate chronicity, such as "chronic subclavian vein thrombosis," "old embolus," or evidence of recanalization or collateral vessel formation. Imaging reports (e.g., ultrasound, venography) confirming the location and chronic nature are essential.

• Differentiate carefully between acute (I82.221) and chronic subclavian vein thrombosis based on documentation.
• Ensure the laterality (right) is explicitly stated in the medical record to support this specific code.
• Consider sequencing this code after any underlying cause of the thrombosis, if known and documented (e.g., malignancy, hypercoagulable state).