Chronic embolism and thrombosis of other thoracic veins

This code signifies the presence of a persistent blood clot or blockage within a non-pulmonary vein located in the chest cavity. This condition is chronic, indicating a long-standing or recurrent nature, and affects thoracic veins other than those directly involved in pulmonary circulation. It describes the sequelae of a past acute event or a slowly developing thrombotic process.

Apply this code when documentation clearly indicates a chronic, non-acute embolism or thrombosis affecting thoracic veins such as the superior vena cava, subclavian, or brachiocephalic veins. This is supported by imaging studies (e.g., CT, MRI, venography) showing persistent occlusion or stenosis, and clinical signs/symptoms consistent with chronic venous obstruction.

• Differentiate from acute events; if the event is acute, a different code from the I82.2- series would be appropriate.
• Ensure the documentation specifies "chronic" and identifies the affected vein as thoracic but not pulmonary.
• Consider sequencing with codes for underlying causes (e.g., malignancy, hypercoagulable states) or associated complications.