O46.9Antepartum hemorrhage, unspecified

O46.9 is the ICD-10-CM diagnosis code for antepartum hemorrhage, unspecified. It belongs to category O46 (antepartum hemorrhage, not elsewhere classified), 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 O46, choose O46.9 (Antepartum hemorrhage, unspecified) only when documentation doesn't support a more specific option: antepartum hemorrhage with coagulation defect (O46.0) and other antepartum hemorrhage (O46.8).

To report this condition, pick the subcode that matches the documentation: O46.90 (unspecified trimester), O46.91 (first trimester), O46.92 (second trimester) and O46.93 (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.