Chronic embolism and thombos unsp deep veins of l low extrem

This code signifies a long-standing blockage within the deep venous system of the left leg, caused by either a blood clot (thrombosis) or a dislodged mass (embolism). The specific deep vein affected is not documented. This condition can lead to chronic venous insufficiency, pain, and swelling.

Use this code when documentation clearly indicates a chronic deep vein thrombosis or embolism affecting the left lower extremity, and the specific deep vein involved is not specified. This typically applies to patients with persistent symptoms following an acute event, or those diagnosed with chronic DVT without further anatomical detail. Supporting documentation includes imaging reports (e.g., ultrasound, venography) and physician notes confirming the chronicity and laterality.

• Ensure the documentation explicitly states "chronic" to differentiate from acute events.
• Verify the laterality is specified as "left lower extremity"; avoid using this code for bilateral or right-sided conditions.
• Do not use this code if a specific deep vein (e.g., femoral, popliteal) is identified; instead, select a more specific code from the I82.5 series.