O04Complications following (induced) termination of pregnancy

O04 is the ICD-10-CM diagnosis code for complications following (induced) termination of pregnancy. It belongs to block O00-O08 (pregnancy with abortive outcome) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: O04.5 (pregnancy), O04.6 (pregnancy), O04.7 (pregnancy) and O04.8 (complications).

The conditions in its Excludes2 note aren't part of O04, but may be coded alongside it if the patient has both: encounter for elective termination of pregnancy (Z33.2) and failed attempted termination of pregnancy (O07.-).

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