Chronic embolism and thrombosis of unspecified peroneal vein

This code signifies the presence of a persistent blood clot (thrombosis) or a dislodged clot (embolism) within an unspecified peroneal vein, indicating a long-standing or recurrent nature. It describes a chronic venous obstruction in the lower leg, without specifying laterality.

Use this code when documentation clearly indicates a chronic or recurrent embolism or thrombosis affecting a peroneal vein, and the specific left or right side is not documented. Supporting documentation would include imaging reports (e.g., ultrasound, venography) confirming the presence of a chronic clot in a peroneal vein, along with physician notes describing the chronicity.

• Do not use this code if laterality (left or right) of the peroneal vein is specified; instead, select the more specific I82.551 or I82.552.
• Ensure the documentation explicitly states "chronic" or implies a long-standing condition; otherwise, consider an acute thrombosis code.
• Always sequence this code after any underlying cause or associated conditions, if applicable.