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O23.1

⚠ Non-billable (Header)

Infections of bladder in pregnancy

Pregnancy, childbirth and the puerperium (O00-O9A)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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⚠️ Excludes2

inherited

Rules inherited from parent codes.

O23
  • • 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)

📋 Code Instructions

inherited
O23
  • • code to identify organism (B95.-, B96.-)

Child Codes (4)

O23.10Infections of bladder in pregnancy, unspecified trimesterO23.11Infections of bladder in pregnancy, first trimesterO23.12Infections of bladder in pregnancy, second trimesterO23.13Infections of bladder in pregnancy, third trimester

Clinical Description

ICD-10-CM code O23.1 represents infections of bladder in pregnancy. This code falls under the Pregnancy, childbirth and the puerperium (O00-O9A) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

This is a 5-character code at the 4th level of specificity. There are 4 more specific child codes under O23.1.

Frequently Asked Questions

What is ICD-10 code O23.1?

ICD-10-CM code O23.1 is "Infections of bladder in pregnancy". It belongs to the category: Pregnancy, childbirth and the puerperium (O00-O9A).

Is O23.1 a billable ICD-10 code?

No, O23.1 is a non-billable header code. A more specific child code must be used for billing.

Can O23.1 be coded with other codes?

O23.1 has 5 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in O23

Other codes in the same category that may be relevant for differential coding:

O23.0Infections of kidney in pregnancyO23.2Infections of urethra in pregnancyO23.3Infections of other parts of urinary tract in pregnancyO23.4Unspecified infection of urinary tract in pregnancyO23.5Infections of the genital tract in pregnancyO23.9Unspecified genitourinary tract infection in pregnancy

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Code Information

CodeO23.1
BillableNo — Header code
ParentO23
CategoryPregnancy, childbirth and the puerperium (O00-O9A)
Excludes10 rule(s)
Excludes25 note(s)
Child codes4

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)