O23.42 – Unspecified infection of urinary tract in pregnancy, second trimester

ICD-10-CM 2027 diagnosis code · Other maternal disorders predominantly related to pregnancy

Billable code

ICD-10-CM code O23.42

Code: O23.42 (claims format: O2342)
Description: Unspecified infection of urinary tract in pregnancy, second trimester
Short description: Unsp infct of urinary tract in pregnancy, second trimester
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block: O20-O29 Other maternal disorders predominantly related to pregnancy
Parent codes: O23 › O23.4

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

O23 – Infections of genitourinary tract in pregnancy

Excludes2 (not included here):

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)

Use additional code:

code to identify organism (B95.-, B96.-)

Block O20-O29

Excludes2 (not included here):

maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)

Related codes in O23.4

Frequently asked questions

What is ICD-10 code O23.42?

O23.42 is the ICD-10-CM code for unspecified infection of urinary tract in pregnancy, second trimester, in the block O20-O29 (Other maternal disorders predominantly related to pregnancy).

Is O23.42 a billable code?

Yes. O23.42 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does O23.42 belong to?

It belongs to category O23 – Infections of genitourinary tract in pregnancy.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.