I87.09Postthrombotic syndrome with other complications

I87.09 is the ICD-10-CM diagnosis code for Postthrombotic syndrome with other complications. It belongs to category I87 (other disorders of veins), 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 I87.0, choose I87.09 (with other complications) only when documentation doesn't support a more specific option: without complications (I87.00), with ulcer (I87.01), with inflammation (I87.02) and with ulcer and inflammation (I87.03).

To report this condition, pick the subcode that matches the documentation: I87.091 (of right lower extremity), I87.092 (of left lower extremity), I87.093 (of bilateral lower extremity) and I87.099 (of unspecified lower extremity).

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