A09 vs P35
A09 (Infectious gastroenteritis and colitis, unspecified) 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 A09: “intestinal infectious disease (A00-A09)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| A09Infectious gastroenteritis and colitis, unspecified | P35Congenital viral diseases | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | P00-P96 — Certain Conditions Originating in the Perinatal Period (P00-P96) |
| Definition | Infectious gastroenteritis and colitis, unspecified is a billable ICD-10-CM diagnosis code (A09). | Congenital viral diseases is a non-billable ICD-10-CM category code (P35). |
| Includes | Infectious colitis NOS Infectious enteritis NOS Infectious gastroenteritis NOS | infections acquired in utero or during birth |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources