Chronic embolism and thombos of deep vein of unsp low extrm

This code signifies a persistent blockage (embolism or thrombosis) within a deep vein of the lower extremity, where the specific deep vein is identified but the laterality (left or right leg) is not documented. This condition is chronic, indicating a long-standing or recurrent nature of the venous obstruction.

Use this code when documentation clearly states a chronic deep vein thrombosis or embolism in a specified deep vein of the lower extremity (e.g., popliteal, femoral, tibial) but does not specify which leg. This code is appropriate when the physician's notes confirm the chronicity and the specific deep vein involved, but laterality is absent.

• Ensure documentation specifies "chronic" and identifies a deep vein (e.g., popliteal, femoral, tibial) but lacks laterality.
• Avoid using this code if laterality (left or right) is documented; instead, choose a more specific code from the I82.59- series.
• Do not use for acute deep vein thrombosis; refer to codes in the I82.4- series for acute conditions.