N36 vs O23

N36 (Other disorders of urethra) compared with O23 (Infections of genitourinary tract in 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. N36 carries an Excludes2 note covering O23: “pregnancy, childbirth and the puerperium (O23.-, O75.3, O86.2-)”

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

Side by side

	N36Other disorders of urethra	O23Infections of genitourinary tract in pregnancy
Billing status	Non-billable header Report instead: N36.0, N36.1, N36.2, N36.41, N36.42	Non-billable header Report instead: O23.00, O23.01, O23.02, O23.03, O23.10
Classification	N00-N99 — Diseases of the Genitourinary System (N00-N99)	O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A)
Definition	Other disorders of urethra is a non-billable ICD-10-CM category code (N36).	Infections of genitourinary tract in pregnancy is a non-billable ICD-10-CM category code (O23).
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