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  6. 2026 ICD-10-CM Code O23

2026 ICD-10-CM Diagnosis Code O23

Infections of genitourinary tract in pregnancy

ICD-10-CM Code:
O23
ICD-10 Code for:
Infections of genitourinary tract in pregnancy
Is Billable?
Not Valid for Submission
Code Navigator:

O23 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of infections of genitourinary tract in pregnancy. The code is not specific and is NOT valid for the year 2026 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Infections of genitourinary tract in pregnancy

Non-specific codes like O23 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for infections of genitourinary tract in pregnancy:

  • O23.0 for Infections of kidney in pregnancy - NON-BILLABLE CODE

  • Use O23.00 for Infections of kidney in pregnancy, unspecified trimester - BILLABLE CODE

  • Use O23.01 for Infections of kidney in pregnancy, first trimester - BILLABLE CODE

  • Use O23.02 for Infections of kidney in pregnancy, second trimester - BILLABLE CODE

  • Use O23.03 for Infections of kidney in pregnancy, third trimester - BILLABLE CODE

  • O23.1 for Infections of bladder in pregnancy - NON-BILLABLE CODE

  • Use O23.10 for Infections of bladder in pregnancy, unspecified trimester - BILLABLE CODE

  • Use O23.11 for Infections of bladder in pregnancy, first trimester - BILLABLE CODE

  • Use O23.12 for Infections of bladder in pregnancy, second trimester - BILLABLE CODE

  • Use O23.13 for Infections of bladder in pregnancy, third trimester - BILLABLE CODE

  • O23.2 for Infections of urethra in pregnancy - NON-BILLABLE CODE

  • Use O23.20 for Infections of urethra in pregnancy, unspecified trimester - BILLABLE CODE

  • Use O23.21 for Infections of urethra in pregnancy, first trimester - BILLABLE CODE

  • Use O23.22 for Infections of urethra in pregnancy, second trimester - BILLABLE CODE

  • Use O23.23 for Infections of urethra in pregnancy, third trimester - BILLABLE CODE

  • O23.3 for Infections of other parts of urinary tract in pregnancy - NON-BILLABLE CODE

  • Use O23.30 for Infections of other parts of urinary tract in pregnancy, unspecified trimester - BILLABLE CODE

  • Use O23.31 for Infections of other parts of urinary tract in pregnancy, first trimester - BILLABLE CODE

  • Use O23.32 for Infections of other parts of urinary tract in pregnancy, second trimester - BILLABLE CODE

  • Use O23.33 for Infections of other parts of urinary tract in pregnancy, third trimester - BILLABLE CODE

  • O23.4 for Unspecified infection of urinary tract in pregnancy - NON-BILLABLE CODE

  • Use O23.40 for Unspecified infection of urinary tract in pregnancy, unspecified trimester - BILLABLE CODE

  • Use O23.41 for Unspecified infection of urinary tract in pregnancy, first trimester - BILLABLE CODE

  • Use O23.42 for Unspecified infection of urinary tract in pregnancy, second trimester - BILLABLE CODE

  • Use O23.43 for Unspecified infection of urinary tract in pregnancy, third trimester - BILLABLE CODE

  • O23.5 for Infections of the genital tract in pregnancy - NON-BILLABLE CODE

  • O23.51 for Infection of cervix in pregnancy - NON-BILLABLE CODE

  • O23.52 for Salpingo-oophoritis in pregnancy - NON-BILLABLE CODE

  • O23.59 for Infection of other part of genital tract in pregnancy - NON-BILLABLE CODE

  • O23.9 for Unspecified genitourinary tract infection in pregnancy - NON-BILLABLE CODE

  • Use O23.90 for Unspecified genitourinary tract infection in pregnancy, unspecified trimester - BILLABLE CODE

  • Use O23.91 for Unspecified genitourinary tract infection in pregnancy, first trimester - BILLABLE CODE

  • Use O23.92 for Unspecified genitourinary tract infection in pregnancy, second trimester - BILLABLE CODE

  • Use O23.93 for Unspecified genitourinary tract infection in pregnancy, third trimester - BILLABLE CODE

Code Classification

  • Pregnancy, childbirth and the puerperium
    O00-O9A
    • Other maternal disorders predominantly related to pregnancy
      O20-O29
      • Infections of genitourinary tract in pregnancy
        O23

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Use Additional Code

Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
  • code to identify organism B95 B96

Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • gonococcal infections complicating pregnancy, childbirth and the puerperium O98.2
  • infections with a predominantly sexual mode of transmission NOS complicating pregnancy, childbirth and the puerperium O98.3
  • syphilis complicating pregnancy, childbirth and the puerperium O98.1
  • tuberculosis of genitourinary system complicating pregnancy, childbirth and the puerperium O98.0
  • venereal disease NOS complicating pregnancy, childbirth and the puerperium O98.3

Patient Education


Infections and Pregnancy

How can infections affect your pregnancy?

During pregnancy, some common infections such as the common cold or a skin infection do not usually cause serious problems. Some infections, such as the flu, can be more severe when you're pregnant. But other infections can be harmful to you, your fetus, or both.

Certain infections during pregnancy may lead to or cause complications or health problems for your fetus, such as:

  • Preterm birth
  • Low birth weight
  • Serious illness
  • Birth defects
  • Lifelong disabilities, such as hearing loss or learning problems

What infections can be harmful during pregnancy?

Some infections that can be harmful during pregnancy include:

  • Bacterial vaginosis (BV)
  • Group B strep (GBS)
  • Cytomegalovirus
  • Hepatitis
  • Sexually transmitted infections (STIs)
  • Toxoplasmosis
  • Urinary tract infections
  • Yeast infections
  • Zika virus

What are the symptoms of an infection during pregnancy?

Sometimes, it's hard to know what's normal during pregnancy. Symptoms of an infection can vary based on the infection. Talk with your health care provider about what symptoms to look for and how to keep healthy. But, if something is worrying you, share your symptoms with your provider for early detection and treatment of infections.

What are the treatments for infections during pregnancy?

If you do get an infection during pregnancy, contact your provider about treatment that will best protect you and your fetus. Only some medicines are safe during pregnancy.

Can infections during pregnancy be prevented?

Taking care of yourself and getting early and regular prenatal care from your provider may help identify and treat infections early.

To lower your risk of certain infections or prevent others:

  • Don't eat raw or undercooked meat.
  • Don't share food or drinks with other people.
  • Wash your hands frequently.
  • Don't clean litter boxes. Cats can transmit toxoplasmosis.
  • Talk to your provider about vaccinations.
  • If you have sex, use a condom every time.

Department of Health and Human Services, Office on Women's Health


[Learn More in MedlinePlus]

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.