A50 vs P35

A50 (Congenital syphilis) compared with P35 (Congenital viral diseases), 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. P35 carries an Excludes2 note covering A50: “congenital syphilis (A50.-)”

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

Side by side

	A50Congenital syphilis	P35Congenital viral diseases
Billing status	Non-billable header Report instead: A50.01, A50.02, A50.03, A50.04, A50.05	Non-billable header Report instead: P35.0, P35.1, P35.2, P35.3, P35.4
Classification	A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99)	P00-P96 — Certain Conditions Originating in the Perinatal Period (P00-P96)
Definition	Congenital syphilis is a non-billable ICD-10-CM category code (A50).	Congenital viral diseases is a non-billable ICD-10-CM category code (P35).
Includes	—	infections acquired in utero or during birth

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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