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    v1.0.28
    OpenPayerBilling CodesOther maternal disorders predominantly related to pregnancyICD-10-CM o23-infections-of-genitourinary-tract
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    ICD-10-CM Code For Infections Of Genitourinary Tract In Pregnancy: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group O23 includes infections of the urinary and genital tracts occurring during pregnancy, such as bacterial cystitis, acute pyelonephritis, and other specified genitourinary infections that complicate pregnancy. These ICD-10-CM diagnosis codes are used to document clinical scenarios in pregnant patients, capturing infection severity, site of involvement, and pregnancy-related complications relevant to this group. Accurate coding within the ICD-10-CM O23 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM O23: Infections Of Genitourinary Tract In Pregnancy Overview

    This group represents infections of the urinary and genital tracts that occur during pregnancy, including cystitis, pyelonephritis, and sexually transmitted infections affecting the genital tract. It targets the genitourinary system in pregnant patients and captures conditions that can affect maternal and fetal health. Accurate coding matters for reimbursement because it documents pregnancy-related complications and supports appropriate claim adjudication.

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    When to Use

    Use a code from this group when a pregnant patient is diagnosed with a urinary or genital tract infection that complicates the pregnancy. Codes apply when documentation specifies infection type, site, and any pregnancy-related complications or trimester when required.

    ICD-10-CM Codes

    36 rows

    ICD-10-CM CodeDescription
    O23.00Infections of kidney in pregnancy, unspecified trimester
    O23.01Infections of kidney in pregnancy, first trimester
    O23.02Infections of kidney in pregnancy, second trimester
    O23.03Infections of kidney in pregnancy, third trimester
    O23.10Infections of bladder in pregnancy, unspecified trimester
    O23.11Infections of bladder in pregnancy, first trimester
    O23.12Infections of bladder in pregnancy, second trimester
    O23.13Infections of bladder in pregnancy, third trimester
    O23.20Infections of urethra in pregnancy, unspecified trimester
    O23.21Infections of urethra in pregnancy, first trimester
    O23.22Infections of urethra in pregnancy, second trimester
    O23.23Infections of urethra in pregnancy, third trimester
    O23.30Infections of other parts of urinary tract in pregnancy, unspecified trimester
    O23.31Infections of other parts of urinary tract in pregnancy, first trimester
    O23.32Infections of other parts of urinary tract in pregnancy, second trimester
    O23.33Infections of other parts of urinary tract in pregnancy, third trimester
    O23.40Unspecified infection of urinary tract in pregnancy, unspecified trimester
    O23.41Unspecified infection of urinary tract in pregnancy, first trimester
    O23.42Unspecified infection of urinary tract in pregnancy, second trimester
    O23.43Unspecified infection of urinary tract in pregnancy, third trimester

    Showing 1–20 of 36

    DRG Codes

    6 rows

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

    Typical Clinical Scenarios

    • Pregnant woman in her first trimester presents to the urgent care with dysuria, frequency, and suprapubic pain; urine testing shows a positive nitrite and leukocyte esterase and urine culture grows Escherichia coli consistent with acute cystitis in pregnancy. A diagnosis from this group is assigned because the urinary tract infection is directly related to pregnancy and requires pregnancy-specific coding and management considerations. Typical codes: O23.00, O23.01
    • A woman in her second trimester with poorly controlled diabetes is evaluated for recurrent bacteriuria that has persisted despite prior treatment; she reports minimal symptoms but serial urine cultures show persistent bacteriuria and repeat treatment is being considered to prevent complications. This group is used to capture ongoing or recurrent genitourinary infection complicating the pregnancy as a comorbidity requiring monitoring. Typical codes: O23.30, O23.31, O23.32
    • Pregnant patient presents to the emergency department with fever, flank pain, chills, and evidence of systemic infection; imaging and labs confirm pyelonephritis with sepsis physiology requiring IV antibiotics and hospitalization. A code from this group is assigned because this is an acute, severe genitourinary infection occurring during pregnancy that impacts maternal care and pregnancy management. Typical codes: O23.10, O23.11, O23.12

    Related Codes

    O20-HEMORRHAGE-IN-EARLY-PREGNANCY

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

    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

    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. 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. 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. 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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