I82.56Chronic embolism and thrombosis of calf muscular vein

I82.56 is the ICD-10-CM diagnosis code for chronic embolism and thrombosis of calf muscular vein. It belongs to category I82 (other venous embolism and thrombosis), block I80-I89 (diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within I82.5 (chronic embolism and thrombosis of deep veins of lower extremity), I82.56 is specifically for chronic embolism and thrombosis of calf muscular vein. Related codes cover unspecified deep veins of lower extremity (I82.50), femoral vein (I82.51), iliac vein (I82.52), popliteal vein (I82.53), tibial vein (I82.54), peroneal vein (I82.55), other specified deep vein of lower extremity (I82.59), unspecified deep veins of proximal lower extremity (I82.5Y) and 1 more.

To report this condition, pick the subcode that matches the documentation: I82.561 (vein), I82.562 (vein), I82.563 (bilateral) and I82.569 (vein).

Code first venous embolism and thrombosis complicating: abortion, ectopic or molar pregnancy (O00-O07, O08.7) and pregnancy, childbirth and the puerperium (O22.-, O87.-).

It was added in FY2020, effective October 1, 2019.