O36.71X0 Maternal care for viable fetus in abdominal pregnancy, first trimester, not applicable or unspecified

ICD-10-CM O36.71X0: Maternal care for viable fetus in abdominal pregnancy, first trimester

ICD-10-CM code O36.71X0 designates maternal care for a viable fetus in an abdominal pregnancy during the first trimester. An abdominal pregnancy occurs outside the female reproductive organs. The sources establish that this is a rare ectopic pregnancy associated with severe risks. This code specifically captures the first-trimester timeframe when the fetus number is not applicable or unspecified. 3 4

Plain-language overview

An abdominal pregnancy is a type of ectopic pregnancy that occurs in the abdominal cavity outside of the female reproductive organs, and the supplied clinical literature notes it is a very rare condition. 2 4

What this code represents

The ICD-10-CM code O36.71X0 specifically represents maternal care for a viable fetus in an abdominal pregnancy during the first trimester, with the final character indicating the fetus number is not applicable or unspecified. 3

Coding details

Within the ICD-10-CM hierarchy, O36.71X0 is distinct from the unspecified trimester code O36.70X0, as well as the second and third trimester codes O36.72X0 and O36.73X0, by explicitly designating the first trimester of the pregnancy. 3

Documentation considerations

Clinical documentation for an abdominal pregnancy diagnosis via ultrasound includes visualizing an empty uterus with a gestational sac or mass in the abdomen, excluding the fallopian tubes and ovaries. 2

Additional ultrasound diagnostic features for an abdominal pregnancy include a fetus outside the uterus, failure to see a uterine wall between the fetus and the urinary bladder, and a placenta outside the uterine cavity. 4

Clinical context

The clinical literature identifies ectopic pregnancy as the leading cause of maternal morbidity and mortality during the first trimester, with abdominal pregnancy specifically associated with potentially catastrophic complications including maternal death. 2 4

What the sources add

While the ICD-10-CM listing provides the exact code structure and trimester designation for O36.71X0, the clinical references provide the operational definition of an abdominal pregnancy and its associated severe maternal risks. 3 4

The clinical source notes that first trimester ultrasound is useful for patients with high risk features, whereas the coding source establishes the specific alphanumeric code used for first trimester abdominal pregnancies. 2 3

Sources

1. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-26.
2. Surviving Fetus from a Full Term Abdominal Pregnancy — pmc.ncbi.nlm.nih.gov; accessed 2026-07-26.
3. Prenatal Obstetrical Ultrasound Appendix A: High Risk ... — hpo-docs.jh.edu; accessed 2026-07-26.
4. Abdominal pregnancy — isuog.org; accessed 2026-07-26.