O23 vs O48

O23 (Infections of genitourinary tract in pregnancy) compared with O48 (Late pregnancy), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Can these codes be reported together?

Yes, when both are documented. O23 carries an Excludes2 note covering O48: “maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

	O23Infections of genitourinary tract in pregnancy	O48Late pregnancy
Billing status	Non-billable header Report instead: O23.00, O23.01, O23.02, O23.03, O23.10	Non-billable header Report instead: O48.0, O48.1
Classification	O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A)	O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A)
Definition	Infections of genitourinary tract in pregnancy is a non-billable ICD-10-CM category code (O23).	Late pregnancy is a non-billable ICD-10-CM category code (O48).
Use additional code	code to identify organism (B95.-, B96.-)	—

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources