J18 vs J84.178
J18 (Pneumonia, unspecified organism) compared with J84.178 (Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhere), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. J18 carries an Excludes1 note covering J84.178: “usual interstitial pneumonia (J84.178)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| J18Pneumonia, unspecified organism | J84.178Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhere | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | J00-J99 — Diseases of the Respiratory System (J00-J99) | J00-J99 — Diseases of the Respiratory System (J00-J99) |
| Definition | Pneumonia, unspecified organism is a non-billable ICD-10-CM category code (J18). | Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhere is a billable ICD-10-CM diagnosis code (J84.178). |
| Includes | — | Interstitial pneumonia (nonspecific) (usual) due to collagen vascular disease Interstitial pneumonia (nonspecific) (usual) in diseases classified elsewhere Organizing pneumonia due to collagen vascular disease Organizing pneumonia in diseases classified elsewhere |
| Use additional code | code, if applicable, to identify resistance to antimicrobial drugs (Z16.-) | — |
| Code first | , if applicable, associated influenza (J09.X1, J10.0-, J11.0-) | underlying disease, such as: progressive systemic sclerosis (M34.0) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources