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  5. Placental disorders (O43)

Placental disorders (O43)

ICD-10 code section O43 covers a range of placental disorders occurring during pregnancy, including transfusion syndromes and various placental malformations. These codes specify the type of placental condition and often the trimester in which it occurs, enabling precise documentation and management of pregnancy complications.

This section includes placental transfusion syndromes, such as fetomaternal and fetus-to-fetus transfusions, which are critical to identify as they affect fetal blood flow and require targeted care. For example, O43.019 addresses fetomaternal placental transfusion syndrome and is linked to terms like fetal-maternal hemorrhage or maternofetal transfusion. Placental malformations like circumvallate placenta (O43.11) and velamentous insertion of the umbilical cord (O43.12) are also included, with synonyms such as placenta circumvallata and marginal insertion, respectively. The section covers morbidly adherent placentas, including placenta accreta, increta, and percreta (O43.21-O43.23), all requiring careful monitoring due to risks during delivery.

Additionally, other placental disorders like placental infarction (O43.81) and various unspecified or rare abnormalities are accounted for. These ICD-10 codes assist healthcare providers and medical coders in identifying specific placental complications, guiding appropriate maternal and fetal management across all pregnancy stages.

  • Pregnancy, childbirth and the puerperium (O00-O9A)

    • Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)

        • Placental disorders (O43)

        • O43 Placental disorders
        • O43.0 Placental transfusion syndromes
        • O43.01 Fetomaternal placental transfusion syndrome
        • O43.011 Fetomaternal placental transfusion syndrome, first trimester
        • O43.012 Fetomaternal placental transfusion syndrome, second trimester
        • O43.013 Fetomaternal placental transfusion syndrome, third trimester
        • O43.019 Fetomaternal placental transfusion syndrome, unspecified trimester
        • O43.02 Fetus-to-fetus placental transfusion syndrome
        • O43.021 Fetus-to-fetus placental transfusion syndrome, first trimester
        • O43.022 Fetus-to-fetus placental transfusion syndrome, second trimester
        • O43.023 Fetus-to-fetus placental transfusion syndrome, third trimester
        • O43.029 Fetus-to-fetus placental transfusion syndrome, unspecified trimester
        • O43.1 Malformation of placenta
        • O43.10 Malformation of placenta, unspecified
        • O43.101 Malformation of placenta, unspecified, first trimester
        • O43.102 Malformation of placenta, unspecified, second trimester
        • O43.103 Malformation of placenta, unspecified, third trimester
        • O43.109 Malformation of placenta, unspecified, unspecified trimester
        • O43.11 Circumvallate placenta
        • O43.111 Circumvallate placenta, first trimester
        • O43.112 Circumvallate placenta, second trimester
        • O43.113 Circumvallate placenta, third trimester
        • O43.119 Circumvallate placenta, unspecified trimester
        • O43.12 Velamentous insertion of umbilical cord
        • O43.121 Velamentous insertion of umbilical cord, first trimester
        • O43.122 Velamentous insertion of umbilical cord, second trimester
        • O43.123 Velamentous insertion of umbilical cord, third trimester
        • O43.129 Velamentous insertion of umbilical cord, unspecified trimester
        • O43.19 Other malformation of placenta
        • O43.191 Other malformation of placenta, first trimester
        • O43.192 Other malformation of placenta, second trimester
        • O43.193 Other malformation of placenta, third trimester
        • O43.199 Other malformation of placenta, unspecified trimester
        • O43.2 Morbidly adherent placenta
        • O43.21 Placenta accreta
        • O43.211 Placenta accreta, first trimester
        • O43.212 Placenta accreta, second trimester
        • O43.213 Placenta accreta, third trimester
        • O43.219 Placenta accreta, unspecified trimester
        • O43.22 Placenta increta
        • O43.221 Placenta increta, first trimester
        • O43.222 Placenta increta, second trimester
        • O43.223 Placenta increta, third trimester
        • O43.229 Placenta increta, unspecified trimester
        • O43.23 Placenta percreta
        • O43.231 Placenta percreta, first trimester
        • O43.232 Placenta percreta, second trimester
        • O43.233 Placenta percreta, third trimester
        • O43.239 Placenta percreta, unspecified trimester
        • O43.8 Other placental disorders
        • O43.81 Placental infarction
        • O43.811 Placental infarction, first trimester
        • O43.812 Placental infarction, second trimester
        • O43.813 Placental infarction, third trimester
        • O43.819 Placental infarction, unspecified trimester
        • O43.89 Other placental disorders
        • O43.891 Other placental disorders, first trimester
        • O43.892 Other placental disorders, second trimester
        • O43.893 Other placental disorders, third trimester
        • O43.899 Other placental disorders, unspecified trimester
        • O43.9 Unspecified placental disorder
        • O43.90 Unspecified placental disorder, unspecified trimester
        • O43.91 Unspecified placental disorder, first trimester
        • O43.92 Unspecified placental disorder, second trimester
        • O43.93 Unspecified placental disorder, third trimester

Instructional Notations

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

  • maternal care for poor fetal growth due to placental insufficiency O36.5
  • placenta previa O44
  • placental polyp O90.89
  • placentitis O41.14
  • 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.

Gestational Trophoblastic Disease

A group of diseases arising from pregnancy that are commonly associated with hyperplasia of trophoblasts (TROPHOBLAST) and markedly elevated human CHORIONIC GONADOTROPIN. They include HYDATIDIFORM MOLE, invasive mole (HYDATIDIFORM MOLE, INVASIVE), placental-site trophoblastic tumor (TROPHOBLASTIC TUMOR, PLACENTAL SITE), and CHORIOCARCINOMA. These neoplasms have varying propensities for invasion and spread.

Placenta Accreta

Abnormal placentation in which all or parts of the PLACENTA are attached directly to the MYOMETRIUM due to a complete or partial absence of DECIDUA. It is associated with POSTPARTUM HEMORRHAGE because of the failure of placental separation.

Polyhydramnios

A condition of abnormally high AMNIOTIC FLUID volume, such as greater than 2,000 ml in the LAST TRIMESTER and usually diagnosed by ultrasonographic criteria (AMNIOTIC FLUID INDEX). It is associated with maternal DIABETES MELLITUS; MULTIPLE PREGNANCY; CHROMOSOMAL DISORDERS; and congenital abnormalities.