ICD-10-CM Code For Hemorrhage In Early Pregnancy: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group O20 includes diagnoses for bleeding disorders occurring in early pregnancy such as threatened abortion, spontaneous abortion with hemorrhage, and other hemorrhagic events related to the gestational period. These ICD-10-CM diagnosis codes are used to document clinical scenarios involving vaginal bleeding in the first and early second trimester, capturing the presence of hemorrhage, associated pregnancy outcome, and any complications that affect management. Accurate coding within the ICD-10-CM O20 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM O20: Hemorrhage In Early Pregnancy Overview

This group represents diagnoses for bleeding occurring in the first and early second trimester of pregnancy, including threatened abortion, spontaneous abortion with hemorrhage, and other early pregnancy bleeding events. These conditions affect the reproductive system and can signal pregnancy loss or complications requiring monitoring or intervention. Accurate coding is important to reflect clinical severity and to support appropriate claim processing and reimbursement.

When to Use

Use a code from this group when a pregnant patient in the first or early second trimester presents with vaginal bleeding or documented hemorrhage related to the pregnancy. Select the specific code that reflects the clinical scenario such as threatened abortion, spontaneous abortion with hemorrhage, or other specified early pregnancy bleeding.

ICD-10-CM Codes

3 rows

ICD-10-CM Code	Description
O20.0	Threatened abortion
O20.8	Other hemorrhage in early pregnancy
O20.9	Hemorrhage in early pregnancy, unspecified

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 woman in the first trimester presents to the emergency department with sudden onset vaginal bleeding and abdominal cramping after missing her expected menses; pelvic ultrasound confirms an intrauterine pregnancy with a gestational sac and subchorionic hematoma but fetal cardiac activity is present, so bleeding is managed expectantly. A diagnosis from this group is assigned to document early pregnancy hemorrhage without other specified complications. Typical codes: O20.0, O20.9
A patient with confirmed ectopic pregnancy arrives with acute severe vaginal bleeding and hemodynamic instability requiring urgent surgical intervention; intraoperative findings identify tubal rupture and active hemorrhage. A code from this group is used to capture hemorrhage occurring in early pregnancy as part of the acute presentation. Typical codes: O20.8, O20.0
A pregnant patient in early gestation has recurrent light spotting over several weeks with no pain; outpatient evaluation includes serial beta-hCG and follow-up ultrasound showing resolving subchorionic hemorrhage, and the clinician documents nonacute hemorrhage related to early pregnancy as part of ongoing surveillance. A code from this group is assigned to record ongoing early pregnancy bleeding monitored in the outpatient setting. Typical codes: O20.9, O20.0

Related Codes

O21-EXCESSIVE-VOMITING-IN-PREGNANCY

ICD-10-CM Code For Excessive Vomiting In Pregnancy: Group Overview

O22-VENOUS-COMPLICATIONS-AND-HEMORRHOIDS

ICD-10-CM Code For Venous Complications And Hemorrhoids In Pregnancy: Group Overview

O23-INFECTIONS-OF-GENITOURINARY-TRACT

ICD-10-CM Code For Infections Of Genitourinary Tract In Pregnancy: Group Overview

O24-DIABETES-MELLITUS-IN-PREGNANCY

ICD-10-CM Code For Diabetes Mellitus In Pregnancy, Childbirth, And The Puerperium: Group Overview

O25-MALNUTRITION-IN-PREGNANCY

ICD-10-CM Code For Malnutrition In Pregnancy Childbirth And The Puerperium: Group Overview

O26-MATERNAL-CARE-OTHER-CONDITIONS

ICD-10-CM Code For Maternal Care For Other Conditions Predominantly Related To Pregnancy: Group Overview

O28-ABNORMAL-ANTENATAL-SCREENING-FINDINGS

ICD-10-CM Code For Abnormal Findings On Antenatal Screening Of Mother: Group Overview

O29-COMPLICATIONS-OF-ANESTHESIA

ICD-10-CM Code For Complications Of Anesthesia During Pregnancy: Group Overview

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

3 rows

ICD-10-CM Code	Description
O20.0	Threatened abortion
O20.8	Other hemorrhage in early pregnancy
O20.9	Hemorrhage in early pregnancy, unspecified

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 woman in the first trimester presents to the emergency department with sudden onset vaginal bleeding and abdominal cramping after missing her expected menses; pelvic ultrasound confirms an intrauterine pregnancy with a gestational sac and subchorionic hematoma but fetal cardiac activity is present, so bleeding is managed expectantly. A diagnosis from this group is assigned to document early pregnancy hemorrhage without other specified complications. Typical codes: O20.0, O20.9
A patient with confirmed ectopic pregnancy arrives with acute severe vaginal bleeding and hemodynamic instability requiring urgent surgical intervention; intraoperative findings identify tubal rupture and active hemorrhage. A code from this group is used to capture hemorrhage occurring in early pregnancy as part of the acute presentation. Typical codes: O20.8, O20.0
A pregnant patient in early gestation has recurrent light spotting over several weeks with no pain; outpatient evaluation includes serial beta-hCG and follow-up ultrasound showing resolving subchorionic hemorrhage, and the clinician documents nonacute hemorrhage related to early pregnancy as part of ongoing surveillance. A code from this group is assigned to record ongoing early pregnancy bleeding monitored in the outpatient setting. Typical codes: O20.9, O20.0

Related Codes

O21-EXCESSIVE-VOMITING-IN-PREGNANCY

ICD-10-CM Code For Excessive Vomiting In Pregnancy: Group Overview

O22-VENOUS-COMPLICATIONS-AND-HEMORRHOIDS

ICD-10-CM Code For Venous Complications And Hemorrhoids In Pregnancy: Group Overview

O23-INFECTIONS-OF-GENITOURINARY-TRACT

ICD-10-CM Code For Infections Of Genitourinary Tract In Pregnancy: Group Overview

O24-DIABETES-MELLITUS-IN-PREGNANCY

ICD-10-CM Code For Diabetes Mellitus In Pregnancy, Childbirth, And The Puerperium: Group Overview

O25-MALNUTRITION-IN-PREGNANCY

ICD-10-CM Code For Malnutrition In Pregnancy Childbirth And The Puerperium: Group Overview

O26-MATERNAL-CARE-OTHER-CONDITIONS

ICD-10-CM Code For Maternal Care For Other Conditions Predominantly Related To Pregnancy: Group Overview

O28-ABNORMAL-ANTENATAL-SCREENING-FINDINGS

ICD-10-CM Code For Abnormal Findings On Antenatal Screening Of Mother: Group Overview

O29-COMPLICATIONS-OF-ANESTHESIA

ICD-10-CM Code For Complications Of Anesthesia During Pregnancy: Group Overview

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.

Published by

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 Hemorrhage In Early Pregnancy: Group Overview

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ICD-10-CM O20: Hemorrhage In Early Pregnancy Overview

ICD-10-CM Code For Hemorrhage In Early Pregnancy: Group Overview

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ICD-10-CM O20: Hemorrhage In Early Pregnancy Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which diagnoses are included in the ICD-10-CM O20 group?

What clinical scenarios does O20 cover for coding and billing?

How does accurate coding in the O20 group affect reimbursement?

Which DRGs are related to O20 diagnoses for inpatient grouping?

What documentation elements should be reflected when assigning an O20 code?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which diagnoses are included in the ICD-10-CM O20 group?

What clinical scenarios does O20 cover for coding and billing?

How does accurate coding in the O20 group affect reimbursement?

Which DRGs are related to O20 diagnoses for inpatient grouping?

What documentation elements should be reflected when assigning an O20 code?

References