ICD-10 O23
Non-Billable HeaderInfections of genitourinary tract in pregnancy
About ICD-10-CM O23
ICD-10-CM code O23 represents Infections of genitourinary tract in pregnancy. This is a non-billable header code in the Pregnancy, Childbirth, and Puerperium chapter (block O23). The 2026 edition of ICD-10-CM O23 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Coding Tips for O23
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
Most O codes require a 7th character indicating trimester (1 = first, 2 = second, 3 = third). Some require fetus identification character. Code O09 (supervision of high-risk pregnancy) is required as a secondary code when applicable.
Type 2 Excludes
Not included here, the excluded code is not part of O23, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- 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
When coding O23, also report these additional codes when applicable.
- code to identify organism (B95.-, B96.-)
Medicare LCD Coverage for O23
Local Coverage Determinations (LCDs) from CMS MACs that list O23 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing O23.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but O23 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with O23
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To O23
Other codes in section O20-O29 (Other maternal disorders predominantly related to pregnancy).
ICD-10 O23, Billing FAQ
Is ICD-10 code O23 billable? +
No, O23 is a non-billable header code. Use a more specific child code from block O23 when submitting claims.
What codes are Type 2 Excludes for O23? +
Type 2 Excludes (may be coded together when both conditions exist): 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)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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