I82.40Acute embolism and thrombosis of unspecified deep veins of lower extremity

I82.40 is the ICD-10-CM diagnosis code for acute embolism and thrombosis of unspecified deep veins of lower extremity. 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 I82.4, choose I82.40 (unspecified deep veins of lower extremity) only when documentation doesn't support a more specific option: femoral vein (I82.41), iliac vein (I82.42), popliteal vein (I82.43), tibial vein (I82.44), peroneal vein (I82.45), calf muscular vein (I82.46), other specified deep vein of lower extremity (I82.49), unspecified deep veins of proximal lower extremity (I82.4Y) and 1 more.

To report this condition, pick the subcode that matches the documentation: I82.401 (extremity), I82.402 (extremity), I82.403 (bilateral) and I82.409 (extremity).

Don't report I82.40 together with the conditions in its Excludes1 note: acute embolism and thrombosis of unspecified deep veins of distal lower extremity (I82.4Z-) and acute embolism and thrombosis of unspecified deep veins of proximal lower extremity (I82.4Y-).

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 has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.