I00 vs J11
I00 (Rheumatic fever without heart involvement) compared with J11 (Influenza due to unidentified influenza virus), 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. J11 carries an Excludes2 note covering I00: “rheumatic pneumonia (I00)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| I00Rheumatic fever without heart involvement | J11Influenza due to unidentified influenza virus | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | J00-J99 — Diseases of the Respiratory System (J00-J99) |
| Definition | Rheumatic fever without heart involvement is a billable ICD-10-CM diagnosis code (I00). | Influenza due to unidentified influenza virus is a non-billable ICD-10-CM category code (J11). |
| Includes | arthritis, rheumatic, acute or subacute | — |
| Use additional code | — | code, if applicable, to identify resistance to antimicrobial drugs (Z16.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources