O23.0 — Infections of kidney in pregnancy
Is O23.0 billable?
No — O23.0 is a non-billable header code. O23.0 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 4 billable codes beneath O23.0.
O23.0 at a glance
| Code | O23.0 |
|---|---|
| Description | Infections of kidney in pregnancy |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is O23.0 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to O23.0. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Pregnancy › complicated by › pyelitis (single) (uterine)
- Pregnancy › complicated by › infection › kidney (single) (uterine)
Inclusion terms
Alternative wording in documentation that is classified to O23.0.
- Pyelonephritis in pregnancy
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O23.0 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 O23.0 to fully describe the condition. O23.0 is sequenced first.
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Use additional code — inherited from O23
Report an additional code alongside O23.0 to fully describe the condition. O23.0 is sequenced first.
Excludes2 — not included here — inherited from Chapter 15
The conditions below are not part of O23.0, but a patient may have both at the same time. When documentation supports it, O23.0 and the excluded code may both be reported.
Excludes2 — not included here — inherited from O20-O29
The conditions below are not part of O23.0, but a patient may have both at the same time. When documentation supports it, O23.0 and the excluded code may both be reported.
Excludes2 — not included here — inherited from O23
The conditions below are not part of O23.0, but a patient may have both at the same time. When documentation supports it, O23.0 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)
What codes fall under O23.0? (4)
How long has O23.0 existed?
O23.0 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.
What other codes are in the O23 family? (6)
- 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