ICD-10-CM 2027 diagnosis code
O23.5Infections of the genital tract in pregnancy
O23.5 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About O23.5
O23.5 is the ICD-10-CM diagnosis code for infections of the genital tract in pregnancy. It belongs to category O23 (infections of genitourinary tract in pregnancy), block O20-O29 (other maternal disorders predominantly related to pregnancy) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.
Within O23 (infections of genitourinary tract in pregnancy), O23.5 is specifically for infections of the genital tract in pregnancy. Related codes cover infections of kidney in pregnancy (O23.0), infections of bladder in pregnancy (O23.1), infections of urethra in pregnancy (O23.2), infections of other parts of urinary tract in pregnancy (O23.3), unspecified infection of urinary tract in pregnancy (O23.4) and unspecified genitourinary tract infection in pregnancy (O23.9).
To report this condition, pick the subcode that matches the documentation: O23.51 (pregnancy), O23.52 (pregnancy) and O23.59 (pregnancy).
Use an additional code to identify organism (B95.-, B96.-).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under O23.5
- O23.51Infection of cervix in pregnancy
- O23.52Salpingo-oophoritis in pregnancy
- O23.59Infection of other part of genital tract in pregnancy
- O23.591Infection of other part of genital tract in pregnancy, first trimesterBillable
- O23.592Infection of other part of genital tract in pregnancy, second trimesterBillable
- O23.593Infection of other part of genital tract in pregnancy, third trimesterBillable
- O23.599Infection of other part of genital tract in pregnancy, unspecified trimesterBillable
Notes that apply from higher levels
Instructions written at a parent level also apply to O23.5.
› From O23 Infections of genitourinary tract in pregnancy
- 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)
Broader instructions also apply from O20-O29 Other maternal disorders predominantly related to pregnancy and Chapter 15: Pregnancy, childbirth and the puerperium.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about O23.5
Is O23.5 billable?
- No. O23.5 is a header code. Report one of its more specific subcodes instead.