Antepartum hemorrhage, not elsewhere classified (O46)
The O46 ICD-10 code section is used for coding various types of antepartum hemorrhage, which refers to bleeding occurring during pregnancy before labor begins. These codes capture conditions ranging from general bleeding to those complicated by specific coagulation defects.
This section includes codes identifying antepartum hemorrhage with underlying clotting problems such as afibrinogenemia, disseminated intravascular coagulation, or other coagulation defects, often further specified by the trimester of pregnancy. For example, hemorrhage associated with afibrinogenemia (also known as hypofibrinogenemia) is coded under O46.01 and its subcategories. The codes also distinguish bleeding in the first, second, or third trimester, which helps clarify the timing and clinical context. Additionally, O46.8X codes cover other causes of antepartum hemorrhage, including bleeding linked to trauma or conditions like uterine leiomyoma or cervical erosion. Unspecified antepartum hemorrhage codes, such as O46.9, apply when the exact cause or trimester is unknown. Medical coders use these codes specifically to classify bleeding during pregnancy, ensuring accurate documentation of these complex obstetric conditions.
```- O46 - Antepartum hemorrhage, not elsewhere classified
- O46.0 - Antepartum hemorrhage with coagulation defect
- O46.00 - Antepartum hemorrhage with coagulation defect, unsp
- O46.01 - Antepartum hemorrhage with afibrinogenemia
- O46.02 - Antepartum hemorrhage with disseminated intravascul
- O46.09 - Antepartum hemorrhage with other coagulation defect
- O46.8 - Other antepartum hemorrhage
- O46.8X - Other antepartum hemorrhage
- O46.9 - Antepartum hemorrhage, unspecified
Pregnancy, childbirth and the puerperium (O00-O9A)
Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
O46 Antepartum hemorrhage, not elsewhere classified
O46.0 Antepartum hemorrhage with coagulation defect
O46.00 Antepartum hemorrhage with coagulation defect, unspecified
- O46.001 Antepartum hemorrhage with coagulation defect, unspecified, first trimester
- O46.002 Antepartum hemorrhage with coagulation defect, unspecified, second trimester
- O46.003 Antepartum hemorrhage with coagulation defect, unspecified, third trimester
- O46.009 Antepartum hemorrhage with coagulation defect, unspecified, unspecified trimester
O46.01 Antepartum hemorrhage with afibrinogenemia
- O46.011 Antepartum hemorrhage with afibrinogenemia, first trimester
- O46.012 Antepartum hemorrhage with afibrinogenemia, second trimester
- O46.013 Antepartum hemorrhage with afibrinogenemia, third trimester
- O46.019 Antepartum hemorrhage with afibrinogenemia, unspecified trimester
O46.02 Antepartum hemorrhage with disseminated intravascular coagulation
- O46.021 Antepartum hemorrhage with disseminated intravascular coagulation, first trimester
- O46.022 Antepartum hemorrhage with disseminated intravascular coagulation, second trimester
- O46.023 Antepartum hemorrhage with disseminated intravascular coagulation, third trimester
- O46.029 Antepartum hemorrhage with disseminated intravascular coagulation, unspecified trimester
O46.09 Antepartum hemorrhage with other coagulation defect
- O46.091 Antepartum hemorrhage with other coagulation defect, first trimester
- O46.092 Antepartum hemorrhage with other coagulation defect, second trimester
- O46.093 Antepartum hemorrhage with other coagulation defect, third trimester
- O46.099 Antepartum hemorrhage with other coagulation defect, unspecified trimester
O46.8 Other antepartum hemorrhage
O46.8X Other antepartum hemorrhage
- O46.8X1 Other antepartum hemorrhage, first trimester
- O46.8X2 Other antepartum hemorrhage, second trimester
- O46.8X3 Other antepartum hemorrhage, third trimester
- O46.8X9 Other antepartum hemorrhage, unspecified trimester
O46.9 Antepartum hemorrhage, unspecified
- O46.90 Antepartum hemorrhage, unspecified, unspecified trimester
- O46.91 Antepartum hemorrhage, unspecified, first trimester
- O46.92 Antepartum hemorrhage, unspecified, second trimester
- O46.93 Antepartum hemorrhage, unspecified, third trimester
Antepartum hemorrhage, not elsewhere classified (O46)
Instructional Notations
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- hemorrhage in early pregnancy O20
- intrapartum hemorrhage NEC O67
- placenta previa O44
- premature separation of placenta [abruptio placentae] O45
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Afibrinogenemia
A deficiency or absence of FIBRINOGEN in the blood.
Fibrinogen
Plasma glycoprotein clotted by thrombin, composed of a dimer of three non-identical pairs of polypeptide chains (alpha, beta, gamma) held together by disulfide bonds. Fibrinogen clotting is a sol-gel change involving complex molecular arrangements: whereas fibrinogen is cleaved by thrombin to form polypeptides A and B, the proteolytic action of other enzymes yields different fibrinogen degradation products.
