O46.92 Antepartum hemorrhage, unspecified, second trimester

ICD-10-CM Code O46.92: Antepartum hemorrhage, unspecified, second trimester

ICD-10-CM code O46.92 designates antepartum hemorrhage, unspecified, occurring during the second trimester. The terminology is active and structured under a broader parent concept for unspecified antepartum hemorrhage. Clinical literature defines antepartum hemorrhage as genital tract bleeding from pregnancy viability to delivery, noting it as a major obstetric emergency. 1 2

Plain-language overview

Antepartum hemorrhage is defined as bleeding from the genital tract from the time of pregnancy viability for extrauterine survival until the delivery of the baby. 2

What this code represents

Code O46.92 represents the diagnosis of antepartum hemorrhage, unspecified, specifically during the second trimester, and its terminology record is currently active. 1

Coding details

The O46.92 code is a narrower concept under the parent code O46.9, which is the classification for antepartum hemorrhage, unspecified, within the terminology. 1

The semantic type assigned to the O46.92 terminology record is Pathologic Function, and it has narrower concepts within the broader terminology structure. 1

Clinical context

Antepartum hemorrhage is recognized as a major cause of maternal and perinatal morbidity and mortality, representing one of the most frequent emergencies in modern obstetrics. 2

Major complications associated with antepartum hemorrhage include intrauterine fetal deaths, postpartum hemorrhage, and anemia necessitating blood transfusion. 2

Documentation considerations

Clinical documentation for antepartum hemorrhage may involve identifying associated conditions like placenta previa or abruptio placenta, which are noted as leading causes. 2

What the sources add

While the terminology record provides the hierarchical structure for O46.92, clinical research adds context by defining the condition and detailing its associated maternal and fetal complications. 1 2

Coverage and utilization context

A Nevada Medicaid document lists various pregnancy-related diagnosis codes accepted to support medical necessity for cesarean section, including unspecified trimester and second trimester conditions. 3

Sources

1. ICD-10-CM O46.92 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Antepartum Hemorrhage: A Retrospective Analysis from a Northern Nigerian Teaching Hospital — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
3. ICD-10 Diagnosis Codes for Cesarean Section — medicaid.nv.gov; accessed 2026-07-27.