ICD-10-CM Code For Multiple Gestation: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group O30 includes diagnoses for multiple gestation pregnancies such as twin and higher-order gestations and classifications by chorionicity and amnionicity, as well as associated complications. These ICD-10-CM diagnosis codes are used to document maternal and fetal conditions in multiple pregnancies, capturing severity, chorionicity/amnionicity, and clinical complexity relevant to obstetric management. Accurate coding within the ICD-10-CM O30 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM O30: Multiple Gestation Overview

The ICD-10-CM O30 group covers diagnoses related to multiple gestation pregnancies, including twin, triplet, and higher-order pregnancies and their chorionicity and amnionicity distinctions. These codes target maternal care related to the fetus and amniotic cavity and possible delivery complications. Accurate coding matters because it documents clinical complexity, supports appropriate facility and professional billing, and informs care coordination for high-risk pregnancies.

When to Use

Use a code from this group when documenting a pregnancy with more than one fetus, specifying chorionicity and amnionicity when known and when coding encounters for prenatal care, delivery, or complications related to multiple gestation. Select codes that reflect the presence or absence of complications and any identified fetal or placental issues to accurately record clinical status.

ICD-10-CM Codes

88 rows

ICD-10-CM Code	Description
O30.001	Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, first trimester
O30.002	Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, second trimester
O30.003	Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, third trimester
O30.009	Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, unspecified trimester
O30.011	Twin pregnancy, monochorionic/monoamniotic, first trimester
O30.012	Twin pregnancy, monochorionic/monoamniotic, second trimester
O30.013	Twin pregnancy, monochorionic/monoamniotic, third trimester
O30.019	Twin pregnancy, monochorionic/monoamniotic, unspecified trimester
O30.021	Conjoined twin pregnancy, first trimester
O30.022	Conjoined twin pregnancy, second trimester
O30.023	Conjoined twin pregnancy, third trimester
O30.029	Conjoined twin pregnancy, unspecified trimester
O30.031	Twin pregnancy, monochorionic/diamniotic, first trimester
O30.032	Twin pregnancy, monochorionic/diamniotic, second trimester
O30.033	Twin pregnancy, monochorionic/diamniotic, third trimester
O30.039	Twin pregnancy, monochorionic/diamniotic, unspecified trimester
O30.041	Twin pregnancy, dichorionic/diamniotic, first trimester
O30.042	Twin pregnancy, dichorionic/diamniotic, second trimester
O30.043	Twin pregnancy, dichorionic/diamniotic, third trimester
O30.049	Twin pregnancy, dichorionic/diamniotic, unspecified trimester

Showing 1–20 of 88

DRG Codes

6 rows

DRG Code	Description
817	Other Antepartum Diagnoses with O.R. Procedures with MCC
818	Other Antepartum Diagnoses with O.R. Procedures with CC
819	Other Antepartum Diagnoses with O.R. Procedures without CC/MCC
831	Other Antepartum Diagnoses without O.R. Procedures with MCC
832	Other Antepartum Diagnoses without O.R. Procedures with CC
833	Other Antepartum Diagnoses without O.R. Procedures without CC/MCC

Typical Clinical Scenarios

A 28-year-old woman at 18 weeks gestation presents for routine prenatal ultrasound after a prior conception via assisted reproductive technology. The ultrasound confirms diamniotic dichorionic twin pregnancy with both fetuses alive and appropriately grown; prenatal care is initiated with increased surveillance for twin gestation. A code from this group is assigned to document the multiple gestation status and guide obstetric follow-up. Typical codes: O30.011, O30.012
A 34-year-old woman arrives to labor and delivery in active preterm labor at 32 weeks with known monochorionic monoamniotic twins and reduced fetal movements reported for one twin. She requires urgent monitoring, possible tocolysis decisions, and consideration of expedited delivery due to risk to one or both fetuses. A code from this group is used to capture the high-acuity multiple gestation and fetal compromise concern. Typical codes: O30.031, O30.032, O30.033
A 30-year-old pregnant woman with a history of prior cesarean presents for third-trimester prenatal visit with diagnosis of twin gestation complicated by one fetus with intrauterine growth restriction (IUGR) identified on serial growth ultrasounds. She is followed with serial growth scans, nonstress testing, and planning for timing and mode of delivery because the multiple gestation is complicated by a fetal growth restriction. A diagnosis code from this group is assigned to indicate multiple gestation with complications affecting management. Typical codes: O30.191, O30.192

ICD-10-CM Code For Complications Specific To Multiple Gestation: Group Overview

O32-MALPRESENTATION-OF-FETUS

ICD-10-CM Code For Maternal Care For Malpresentation Of Fetus: Group Overview

O33-MATERNAL-CARE-FOR-DISPROPORTION

ICD-10-CM Code For Maternal Care For Disproportion: Group Overview

O34-ABNORMALITY-OF-PELVIC-ORGANS

ICD-10-CM Code For Maternal Care For Abnormality Of Pelvic Organs: Group Overview

O35-MATERNAL-CARE-FOR-FETAL-ABNORMALITY

ICD-10-CM Code For Maternal Care For Known Or Suspected Fetal Abnormality And Damage: Group Overview

O36-MATERNAL-CARE-OTHER-FETAL-PROBLEMS

ICD-10-CM Code For Maternal Care For Other Fetal Problems: Group Overview

O40-POLYHYDRAMNIOS

ICD-10-CM Code For Polyhydramnios: Group Overview

O41-OTHER-DISORDERS-OF-AMNIOTIC-FLUID

ICD-10-CM Code For Other Disorders Of Amniotic Fluid And Membranes: Group Overview

O42-PREMATURE-RUPTURE-OF-MEMBRANES

ICD-10-CM Code For Premature Rupture Of Membranes: Group Overview

O43-PLACENTAL-DISORDERS

ICD-10-CM Code For Placental Disorders: Group Overview

Showing 1–10 of 15

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

88 rows

ICD-10-CM Code	Description
O30.001	Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, first trimester
O30.002	Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, second trimester
O30.003	Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, third trimester
O30.009	Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, unspecified trimester
O30.011	Twin pregnancy, monochorionic/monoamniotic, first trimester
O30.012	Twin pregnancy, monochorionic/monoamniotic, second trimester
O30.013	Twin pregnancy, monochorionic/monoamniotic, third trimester
O30.019	Twin pregnancy, monochorionic/monoamniotic, unspecified trimester
O30.021	Conjoined twin pregnancy, first trimester
O30.022	Conjoined twin pregnancy, second trimester
O30.023	Conjoined twin pregnancy, third trimester
O30.029	Conjoined twin pregnancy, unspecified trimester
O30.031	Twin pregnancy, monochorionic/diamniotic, first trimester
O30.032	Twin pregnancy, monochorionic/diamniotic, second trimester
O30.033	Twin pregnancy, monochorionic/diamniotic, third trimester
O30.039	Twin pregnancy, monochorionic/diamniotic, unspecified trimester
O30.041	Twin pregnancy, dichorionic/diamniotic, first trimester
O30.042	Twin pregnancy, dichorionic/diamniotic, second trimester
O30.043	Twin pregnancy, dichorionic/diamniotic, third trimester
O30.049	Twin pregnancy, dichorionic/diamniotic, unspecified trimester

Showing 1–20 of 88

DRG Codes

6 rows

DRG Code	Description
817	Other Antepartum Diagnoses with O.R. Procedures with MCC
818	Other Antepartum Diagnoses with O.R. Procedures with CC
819	Other Antepartum Diagnoses with O.R. Procedures without CC/MCC
831	Other Antepartum Diagnoses without O.R. Procedures with MCC
832	Other Antepartum Diagnoses without O.R. Procedures with CC
833	Other Antepartum Diagnoses without O.R. Procedures without CC/MCC

Typical Clinical Scenarios

A 28-year-old woman at 18 weeks gestation presents for routine prenatal ultrasound after a prior conception via assisted reproductive technology. The ultrasound confirms diamniotic dichorionic twin pregnancy with both fetuses alive and appropriately grown; prenatal care is initiated with increased surveillance for twin gestation. A code from this group is assigned to document the multiple gestation status and guide obstetric follow-up. Typical codes: O30.011, O30.012
A 34-year-old woman arrives to labor and delivery in active preterm labor at 32 weeks with known monochorionic monoamniotic twins and reduced fetal movements reported for one twin. She requires urgent monitoring, possible tocolysis decisions, and consideration of expedited delivery due to risk to one or both fetuses. A code from this group is used to capture the high-acuity multiple gestation and fetal compromise concern. Typical codes: O30.031, O30.032, O30.033
A 30-year-old pregnant woman with a history of prior cesarean presents for third-trimester prenatal visit with diagnosis of twin gestation complicated by one fetus with intrauterine growth restriction (IUGR) identified on serial growth ultrasounds. She is followed with serial growth scans, nonstress testing, and planning for timing and mode of delivery because the multiple gestation is complicated by a fetal growth restriction. A diagnosis code from this group is assigned to indicate multiple gestation with complications affecting management. Typical codes: O30.191, O30.192

ICD-10-CM Code For Complications Specific To Multiple Gestation: Group Overview

O32-MALPRESENTATION-OF-FETUS

ICD-10-CM Code For Maternal Care For Malpresentation Of Fetus: Group Overview

O33-MATERNAL-CARE-FOR-DISPROPORTION

ICD-10-CM Code For Maternal Care For Disproportion: Group Overview

O34-ABNORMALITY-OF-PELVIC-ORGANS

ICD-10-CM Code For Maternal Care For Abnormality Of Pelvic Organs: Group Overview

O35-MATERNAL-CARE-FOR-FETAL-ABNORMALITY

ICD-10-CM Code For Maternal Care For Known Or Suspected Fetal Abnormality And Damage: Group Overview

O36-MATERNAL-CARE-OTHER-FETAL-PROBLEMS

ICD-10-CM Code For Maternal Care For Other Fetal Problems: Group Overview

O40-POLYHYDRAMNIOS

ICD-10-CM Code For Polyhydramnios: Group Overview

O41-OTHER-DISORDERS-OF-AMNIOTIC-FLUID

ICD-10-CM Code For Other Disorders Of Amniotic Fluid And Membranes: Group Overview

O42-PREMATURE-RUPTURE-OF-MEMBRANES

ICD-10-CM Code For Premature Rupture Of Membranes: Group Overview

O43-PLACENTAL-DISORDERS

ICD-10-CM Code For Placental Disorders: Group Overview

Showing 1–10 of 15

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Multiple Gestation: Group Overview

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ICD-10-CM O30: Multiple Gestation Overview

ICD-10-CM Code For Multiple Gestation: Group Overview

Sign up for ICD-10-CM Code For Multiple Gestation: Group Overview policy alerts

ICD-10-CM O30: Multiple Gestation Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

ICD-10-CM Code For Multiple Gestation: Group Overview

Sign up for ICD-10-CM Code For Multiple Gestation: Group Overview policy alerts

ICD-10-CM O30: Multiple Gestation Overview

ICD-10-CM Code For Multiple Gestation: Group Overview

Sign up for ICD-10-CM Code For Multiple Gestation: Group Overview policy alerts

ICD-10-CM O30: Multiple Gestation Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

How does the ICD-10-CM O30 group classify multiple gestation pregnancies?

Which O30 codes capture trimester specificity and why is that important for coding?

How are complications or complexity represented within the O30 code set?

What codes should be used when chorionicity or number of amniotic sacs cannot be determined?

How does accurate coding within ICD-10-CM O30 support reimbursement and clinical documentation?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

How does the ICD-10-CM O30 group classify multiple gestation pregnancies?

Which O30 codes capture trimester specificity and why is that important for coding?

How are complications or complexity represented within the O30 code set?

What codes should be used when chorionicity or number of amniotic sacs cannot be determined?

How does accurate coding within ICD-10-CM O30 support reimbursement and clinical documentation?

References