I80Phlebitis and thrombophlebitis

I80 is the ICD-10-CM diagnosis code for phlebitis and thrombophlebitis. It belongs to 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 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: I80.0 (of superficial vessels of lower extremities), I80.1 (of femoral vein), I80.2 (of other and unspecified deep vessels of lower extremities), I80.3 (of lower extremities, unspecified), I80.8 (of other sites) and I80.9 (of unspecified site).

Don't report I80 together with the conditions in its Excludes1 note: venous embolism and thrombosis of lower extremities (I82.4-, I82.5-, I82.81-).

Code first: , if applicable: phlebitis and thrombophlebitis complicating abortion, ectopic or molar pregnancy (O00-O07, O08.7) and phlebitis and thrombophlebitis complicating 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.