O23.4 – Unspecified infection of urinary tract in pregnancy

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

Non-billable header

ICD-10-CM code O23.4
Code
O23.4 (claims format: O234)
Description
Unspecified infection of urinary tract in pregnancy
Billable
No – use a more specific code below
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

Billable codes under O23.4

O23.4 is a header code and cannot be used on claims. Choose the most specific code:

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)

Index terms for O23.4

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in O23

Frequently asked questions

What is ICD-10 code O23.4?

O23.4 is the ICD-10-CM code for unspecified infection of urinary tract in pregnancy, in the block O20-O29 (Other maternal disorders predominantly related to pregnancy).

Is O23.4 a billable code?

No. O23.4 is a header code with more specific child codes; report one of the billable codes listed above.

What category does O23.4 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.