O45.9Premature separation of placenta, unspecified

O45.9 is the ICD-10-CM diagnosis code for premature separation of placenta, unspecified. It belongs to category O45 (premature separation of placenta [abruptio placentae]), block O30-O48 (maternal care related to the fetus and amniotic cavity and possible delivery problems) 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.

Within O45, choose O45.9 (Premature separation of placenta, unspecified) only when documentation doesn't support a more specific option: premature separation of placenta with coagulation defect (O45.0) and other premature separation of placenta (O45.8).

To report this condition, pick the subcode that matches the documentation: O45.90 (unspecified trimester), O45.91 (first trimester), O45.92 (second trimester) and O45.93 (third trimester).

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