O23 — Infections of genitourinary tract in pregnancy
Is O23 billable?
No — O23 is a non-billable header code. O23 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 36 billable codes beneath O23.
Billable codes under this header
- O23.00Infections of kidney in pregnancy, unspecified trimester
- O23.01Infections of kidney in pregnancy, first trimester
- O23.02Infections of kidney in pregnancy, second trimester
- O23.03Infections of kidney in pregnancy, third trimester
- O23.10Infections of bladder in pregnancy, unspecified trimester
- O23.11Infections of bladder in pregnancy, first trimester
- O23.12Infections of bladder in pregnancy, second trimester
- O23.13Infections of bladder in pregnancy, third trimester
- O23.20Infections of urethra in pregnancy, unspecified trimester
- O23.21Infections of urethra in pregnancy, first trimester
- O23.22Infections of urethra in pregnancy, second trimester
- O23.23Infections of urethra in pregnancy, third trimester
- O23.30Infections of other parts of urinary tract in pregnancy, unspecified trimester
- O23.31Infections of other parts of urinary tract in pregnancy, first trimester
- O23.32Infections of other parts of urinary tract in pregnancy, second trimester
- O23.33Infections of other parts of urinary tract in pregnancy, third trimester
- O23.40Unspecified infection of urinary tract in pregnancy, unspecified trimester
- O23.41Unspecified infection of urinary tract in pregnancy, first trimester
- O23.42Unspecified infection of urinary tract in pregnancy, second trimester
- O23.43Unspecified infection of urinary tract in pregnancy, third trimester
- O23.90Unspecified genitourinary tract infection in pregnancy, unspecified trimester
- O23.91Unspecified genitourinary tract infection in pregnancy, first trimester
- O23.92Unspecified genitourinary tract infection in pregnancy, second trimester
- O23.93Unspecified genitourinary tract infection in pregnancy, third trimester
- O23.511Infections of cervix in pregnancy, first trimester
- O23.512Infections of cervix in pregnancy, second trimester
- O23.513Infections of cervix in pregnancy, third trimester
- O23.519Infections of cervix in pregnancy, unspecified trimester
- O23.521Salpingo-oophoritis in pregnancy, first trimester
- O23.522Salpingo-oophoritis in pregnancy, second trimester
- O23.523Salpingo-oophoritis in pregnancy, third trimester
- O23.529Salpingo-oophoritis in pregnancy, unspecified trimester
- O23.591Infection of other part of genital tract in pregnancy, first trimester
- O23.592Infection of other part of genital tract in pregnancy, second trimester
- O23.593Infection of other part of genital tract in pregnancy, third trimester
- O23.599Infection of other part of genital tract in pregnancy, unspecified trimester
O23 at a glance
| Code | O23 |
|---|---|
| Description | Infections of genitourinary tract in pregnancy |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Use additional code
Report an additional code alongside O23 to fully describe the condition. O23 is sequenced first.
Excludes2 — not included here
The conditions below are not part of O23, but a patient may have both at the same time. When documentation supports it, O23 and the excluded code may both be reported.
- 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)
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O23 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- supervision of normal pregnancy (Z34.-)
Use additional code — inherited from Chapter 15
Report an additional code alongside O23 to fully describe the condition. O23 is sequenced first.
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Excludes2 — not included here — inherited from Chapter 15
The conditions below are not part of O23, but a patient may have both at the same time. When documentation supports it, O23 and the excluded code may both be reported.
Excludes2 — not included here — inherited from O20-O29
The conditions below are not part of O23, but a patient may have both at the same time. When documentation supports it, O23 and the excluded code may both be reported.
What codes fall under O23? (7)
- O23.0Infections of kidney in pregnancynot billable
- O23.1Infections of bladder in pregnancynot billable
- O23.2Infections of urethra in pregnancynot billable
- O23.3Infections of other parts of urinary tract in pregnancynot billable
- O23.4Unspecified infection of urinary tract in pregnancynot billable
- O23.5Infections of the genital tract in pregnancynot billable
- O23.9Unspecified genitourinary tract infection in pregnancynot billable
How long has O23 existed?
O23 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.