Chronic emblsm and thombos unsp deep veins of low extrm, bi

This code signifies a long-standing blockage within the deep veins of both lower extremities due to an embolism or thrombosis, where the specific deep vein affected is not documented. This condition can lead to chronic venous insufficiency, post-thrombotic syndrome, and other complications.

Use this code when documentation clearly indicates a chronic deep vein thrombosis or embolism affecting both lower extremities, and the specific deep vein (e.g., femoral, popliteal) is not specified. This diagnosis is often supported by imaging studies (e.g., duplex ultrasound, venography) confirming chronic occlusion and clinical signs of bilateral lower extremity venous compromise.

• Ensure documentation explicitly states "chronic" to differentiate from acute events.
• Verify that both lower extremities are affected; if only one is involved, a unilateral code should be used.
• If the specific deep vein is identified (e.g., femoral, popliteal), a more specific code from the I82.5- series should be selected.