ICD-10-CM Code For Maternal Infectious And Parasitic Diseases Classifiable Elsewhere But Complicating Pregnancy: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group O98 includes infectious and parasitic diseases that are classifiable to other chapters but which complicate pregnancy, childbirth, and the puerperium, such as viral, bacterial, and parasitic infections with obstetric impact. These ICD-10-CM diagnosis codes are used to document maternal infections complicating pregnancy that may affect maternal or fetal outcomes, capturing disease etiology, organ involvement, and obstetric complexity. Accurate coding within the ICD-10-CM O98 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM O98: Maternal Infectious And Parasitic Diseases Classifiable Elsewhere But Complicating Pregnancy, Childbirth And The Puerperium Overview

This group includes infectious and parasitic diseases that are classified to other chapters but have become complications of pregnancy, childbirth, or the puerperium. Conditions target maternal infections affecting maternal and fetal health, including viral, bacterial, parasitic, and other infectious etiologies. Accurate coding matters for clinical communication and supports correct reimbursement by reflecting the complexity and resource use associated with pregnancy-related infectious complications.

When to Use

Use codes from this group when a documented infectious or parasitic disease, otherwise classifiable elsewhere, is present and complicates the course of pregnancy, delivery, or the postpartum period. Apply these codes to reflect the infectious etiology and its impact on obstetric care, supporting accurate clinical records and billing.

ICD-10-CM Codes

60 rows

ICD-10-CM Code	Description
O98.011	Tuberculosis complicating pregnancy, first trimester
O98.012	Tuberculosis complicating pregnancy, second trimester
O98.013	Tuberculosis complicating pregnancy, third trimester
O98.019	Tuberculosis complicating pregnancy, unspecified trimester
O98.02	Tuberculosis complicating childbirth
O98.03	Tuberculosis complicating the puerperium
O98.111	Syphilis complicating pregnancy, first trimester
O98.112	Syphilis complicating pregnancy, second trimester
O98.113	Syphilis complicating pregnancy, third trimester
O98.119	Syphilis complicating pregnancy, unspecified trimester
O98.12	Syphilis complicating childbirth
O98.13	Syphilis complicating the puerperium
O98.211	Gonorrhea complicating pregnancy, first trimester
O98.212	Gonorrhea complicating pregnancy, second trimester
O98.213	Gonorrhea complicating pregnancy, third trimester
O98.219	Gonorrhea complicating pregnancy, unspecified trimester
O98.22	Gonorrhea complicating childbirth
O98.23	Gonorrhea complicating the puerperium
O98.311	Other infections with a predominantly sexual mode of transmission complicating pregnancy, first trimester
O98.312	Other infections with a predominantly sexual mode of transmission complicating pregnancy, second trimester

Showing 1–20 of 60

DRG Codes

9 rows

DRG Code	Description
769	Postpartum and Post Abortion Diagnoses with O.R. Procedures
776	Postpartum and Post Abortion Diagnoses without O.R. Procedures
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
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Typical Clinical Scenarios

A pregnant patient at 28 weeks’ gestation presents to the emergency department with sudden onset high fever, rigors, and hypotension after developing a urinary tract infection that has progressed to sepsis. Blood and urine cultures confirm bacteremia with Escherichia coli, and the obstetric team documents systemic infection complicating pregnancy requiring inpatient IV antibiotics and fetal monitoring; a code from this group is assigned because the maternal bacterial infection is classifiable elsewhere but complicates the pregnancy. Typical codes: O98.211, O98.212, O98.213
A woman in her second trimester with known chronic hepatitis B infection attends a routine prenatal clinic visit for antenatal care; viral load testing shows chronic active disease without acute hepatic decompensation. Because the chronic viral infection predates pregnancy and is being managed during pregnancy but still complicates prenatal care planning and monitoring, a code from this group is used to indicate the maternal infectious disease complicating pregnancy. Typical codes: O98.111, O98.112
A postpartum patient on day two after vaginal delivery develops fever, uterine tenderness, and purulent lochia consistent with endometritis; she is admitted for IV antibiotics and close observation for sepsis risk. The puerperal infection is an infectious and parasitic condition classifiable elsewhere (postpartum endometritis) that complicates the puerperium, so a postpartum complicating infection code from this group is assigned. Typical codes: O98.311, O98.312

Related Codes

O94-SEQUELAE-OF-OBSTETRIC-COMPLICATIONS

ICD-10-CM Code For Sequelae Of Complication Of Pregnancy Childbirth And The Puerperium: Group Overview

O99-OTHER-MATERNAL-DISEASES

ICD-10-CM Code For Other Maternal Diseases Classifiable Elsewhere But Complicating Pregnancy Childbirth And The Puerperium: Group Overview

O9A-MATERNAL-MALIGNANCY-TRAUMATIC-INJURY-ABUSE

ICD-10-CM Code For Maternal Malignant Neoplasms Traumatic Injuries And Abuse Classifiable Elsewhere But Complicating Pregnancy Childbirth And The Puerperium: 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

60 rows

ICD-10-CM Code	Description
O98.011	Tuberculosis complicating pregnancy, first trimester
O98.012	Tuberculosis complicating pregnancy, second trimester
O98.013	Tuberculosis complicating pregnancy, third trimester
O98.019	Tuberculosis complicating pregnancy, unspecified trimester
O98.02	Tuberculosis complicating childbirth
O98.03	Tuberculosis complicating the puerperium
O98.111	Syphilis complicating pregnancy, first trimester
O98.112	Syphilis complicating pregnancy, second trimester
O98.113	Syphilis complicating pregnancy, third trimester
O98.119	Syphilis complicating pregnancy, unspecified trimester
O98.12	Syphilis complicating childbirth
O98.13	Syphilis complicating the puerperium
O98.211	Gonorrhea complicating pregnancy, first trimester
O98.212	Gonorrhea complicating pregnancy, second trimester
O98.213	Gonorrhea complicating pregnancy, third trimester
O98.219	Gonorrhea complicating pregnancy, unspecified trimester
O98.22	Gonorrhea complicating childbirth
O98.23	Gonorrhea complicating the puerperium
O98.311	Other infections with a predominantly sexual mode of transmission complicating pregnancy, first trimester
O98.312	Other infections with a predominantly sexual mode of transmission complicating pregnancy, second trimester

Showing 1–20 of 60

DRG Codes

9 rows

DRG Code	Description
769	Postpartum and Post Abortion Diagnoses with O.R. Procedures
776	Postpartum and Post Abortion Diagnoses without O.R. Procedures
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
[object Object]

Typical Clinical Scenarios

A pregnant patient at 28 weeks’ gestation presents to the emergency department with sudden onset high fever, rigors, and hypotension after developing a urinary tract infection that has progressed to sepsis. Blood and urine cultures confirm bacteremia with Escherichia coli, and the obstetric team documents systemic infection complicating pregnancy requiring inpatient IV antibiotics and fetal monitoring; a code from this group is assigned because the maternal bacterial infection is classifiable elsewhere but complicates the pregnancy. Typical codes: O98.211, O98.212, O98.213
A woman in her second trimester with known chronic hepatitis B infection attends a routine prenatal clinic visit for antenatal care; viral load testing shows chronic active disease without acute hepatic decompensation. Because the chronic viral infection predates pregnancy and is being managed during pregnancy but still complicates prenatal care planning and monitoring, a code from this group is used to indicate the maternal infectious disease complicating pregnancy. Typical codes: O98.111, O98.112
A postpartum patient on day two after vaginal delivery develops fever, uterine tenderness, and purulent lochia consistent with endometritis; she is admitted for IV antibiotics and close observation for sepsis risk. The puerperal infection is an infectious and parasitic condition classifiable elsewhere (postpartum endometritis) that complicates the puerperium, so a postpartum complicating infection code from this group is assigned. Typical codes: O98.311, O98.312

Related Codes

O94-SEQUELAE-OF-OBSTETRIC-COMPLICATIONS

ICD-10-CM Code For Sequelae Of Complication Of Pregnancy Childbirth And The Puerperium: Group Overview

O99-OTHER-MATERNAL-DISEASES

ICD-10-CM Code For Other Maternal Diseases Classifiable Elsewhere But Complicating Pregnancy Childbirth And The Puerperium: Group Overview

O9A-MATERNAL-MALIGNANCY-TRAUMATIC-INJURY-ABUSE

ICD-10-CM Code For Maternal Malignant Neoplasms Traumatic Injuries And Abuse Classifiable Elsewhere But Complicating Pregnancy Childbirth And The Puerperium: 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 Maternal Infectious And Parasitic Diseases Classifiable Elsewhere But Complicating Pregnancy: Group Overview

Sign up for ICD-10-CM Code For Maternal Infectious And Parasitic Diseases Classifiable Elsewhere But Complicating Pregnancy: Group Overview policy alerts

ICD-10-CM O98: Maternal Infectious And Parasitic Diseases Classifiable Elsewhere But Complicating Pregnancy, Childbirth And The Puerperium Overview

ICD-10-CM Code For Maternal Infectious And Parasitic Diseases Classifiable Elsewhere But Complicating Pregnancy: Group Overview

Sign up for ICD-10-CM Code For Maternal Infectious And Parasitic Diseases Classifiable Elsewhere But Complicating Pregnancy: Group Overview policy alerts

ICD-10-CM O98: Maternal Infectious And Parasitic Diseases Classifiable Elsewhere But Complicating Pregnancy, Childbirth And The Puerperium Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in ICD-10-CM code group O98?

How do O98 codes capture obstetric detail for infections?

Which DRGs are associated with O98 group diagnoses?

Why is accurate coding of O98 group conditions important for billing and clinical documentation?

What code examples show trimester specificity for tuberculosis and HIV in the O98 group?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in ICD-10-CM code group O98?

How do O98 codes capture obstetric detail for infections?

Which DRGs are associated with O98 group diagnoses?

Why is accurate coding of O98 group conditions important for billing and clinical documentation?

What code examples show trimester specificity for tuberculosis and HIV in the O98 group?

References