ICD-10-CM 2027 diagnosis code
O46Antepartum hemorrhage, not elsewhere classified
O46 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About O46
O46 is the ICD-10-CM diagnosis code for antepartum hemorrhage, not elsewhere classified. It belongs to 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 3 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: O46.0 (defect), O46.8 (hemorrhage) and O46.9 (unspecified).
Don't report O46 together with the conditions in its Excludes1 note: hemorrhage in early pregnancy (O20.-), intrapartum hemorrhage NEC (O67.-), placenta previa (O44.-) and premature separation of placenta [abruptio placentae] (O45.-).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under O46
- O46.0Antepartum hemorrhage with coagulation defect
- O46.00Antepartum hemorrhage with coagulation defect, unspecified
- O46.001Antepartum hemorrhage with coagulation defect, unspecified, first trimesterBillable
- O46.002Antepartum hemorrhage with coagulation defect, unspecified, second trimesterBillable
- O46.003Antepartum hemorrhage with coagulation defect, unspecified, third trimesterBillable
- O46.009Antepartum hemorrhage with coagulation defect, unspecified, unspecified trimesterBillable
- O46.01Antepartum hemorrhage with afibrinogenemia
- O46.011Antepartum hemorrhage with afibrinogenemia, first trimesterBillable
- O46.012Antepartum hemorrhage with afibrinogenemia, second trimesterBillable
- O46.013Antepartum hemorrhage with afibrinogenemia, third trimesterBillable
- O46.019Antepartum hemorrhage with afibrinogenemia, unspecified trimesterBillable
- O46.02Antepartum hemorrhage with disseminated intravascular coagulation
- O46.021Antepartum hemorrhage with disseminated intravascular coagulation, first trimesterBillable
- O46.022Antepartum hemorrhage with disseminated intravascular coagulation, second trimesterBillable
- O46.023Antepartum hemorrhage with disseminated intravascular coagulation, third trimesterBillable
- O46.029Antepartum hemorrhage with disseminated intravascular coagulation, unspecified trimesterBillable
- O46.09Antepartum hemorrhage with other coagulation defect
- O46.091Antepartum hemorrhage with other coagulation defect, first trimesterBillable
- O46.092Antepartum hemorrhage with other coagulation defect, second trimesterBillable
- O46.093Antepartum hemorrhage with other coagulation defect, third trimesterBillable
- O46.099Antepartum hemorrhage with other coagulation defect, unspecified trimesterBillable
- O46.00Antepartum hemorrhage with coagulation defect, unspecified
- O46.8Other antepartum hemorrhage
- O46.9Antepartum hemorrhage, unspecified
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to O46.
Broader instructions also apply from Chapter 15: Pregnancy, childbirth and the puerperium.
Codes whose notes reference O46
- O67Excludes1
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about O46
Is O46 billable?
- No. O46 is a header code. Report one of its more specific subcodes instead.