Chronic embolism and thrombosis of inferior vena cava

This code signifies a persistent or long-standing blockage within the inferior vena cava (IVC) caused by an embolus (a traveling clot) or a thrombus (a stationary clot). This condition can lead to significant venous congestion in the lower extremities and abdominal organs.

Use this code when documentation clearly indicates a chronic, rather than acute, embolic or thrombotic event affecting the inferior vena cava. Supporting documentation should include imaging reports (e.g., venography, CT, MRI) confirming the presence and chronicity of the occlusion, along with clinical signs and symptoms consistent with chronic IVC obstruction.

• Distinguish carefully between acute (I82.21-) and chronic (I82.22-) conditions of the IVC.
• Ensure the documentation specifies the inferior vena cava; do not confuse with other venous thromboses.
• Consider sequencing this code as a primary diagnosis if it is the main reason for the encounter, or as a secondary diagnosis if it is a co-morbidity impacting patient care.