Chronic embolism and thrombosis of superior vena cava

This code signifies the persistent presence of a blood clot or foreign material obstructing the superior vena cava (SVC), a major vein that carries deoxygenated blood from the upper body to the heart. This chronic obstruction can lead to impaired venous return from the head, neck, and upper extremities.

Apply this code when documentation clearly indicates a long-standing or recurrent thrombotic or embolic event affecting the superior vena cava. This is typically supported by imaging studies (e.g., venography, CT, MRI) demonstrating chronic occlusion or significant stenosis of the SVC, often with collateral vessel formation.

• Differentiate from acute SVC thrombosis (I82.210) based on chronicity documented by the provider.
• Consider additional codes for underlying causes (e.g., malignancy, catheter-related thrombosis) or associated complications (e.g., SVC syndrome).
• Ensure the documentation specifies "chronic" or "recurrent" to justify the use of this code over an acute presentation.