Chronic embolism and thrombosis of peroneal vein, bilateral

This code signifies the presence of a persistent blood clot (thrombosis) or a dislodged clot (embolism) within the peroneal veins affecting both lower extremities. This condition is chronic, indicating a long-standing or recurrent nature of the vascular obstruction in these specific deep veins.

Apply this code when documentation clearly indicates chronic peroneal vein thrombosis or embolism affecting both legs. This typically follows diagnostic imaging (e.g., duplex ultrasound, venography) confirming the bilateral presence and chronicity of the occlusion.

• Ensure documentation specifies "chronic" and "bilateral" involvement of the peroneal veins.
• Distinguish from acute peroneal vein thrombosis (I82.4Z3) or unspecified chronicity.
• Code any associated post-thrombotic syndrome or other complications separately.