J90 vs J91.0
J90 (Pleural effusion, not elsewhere classified) compared with J91.0 (Malignant pleural effusion), 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. J90 carries an Excludes1 note covering J91.0: “malignant pleural effusion (J91.0))”
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
| J90Pleural effusion, not elsewhere classified | J91.0Malignant pleural effusion | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | J00-J99 — Diseases of the Respiratory System (J00-J99) | J00-J99 — Diseases of the Respiratory System (J00-J99) |
| Definition | Pleural effusion, not elsewhere classified is a billable ICD-10-CM diagnosis code (J90). | Malignant pleural effusion is a billable ICD-10-CM diagnosis code (J91.0). |
| Includes | Encysted pleurisy Pleural effusion NOS Pleurisy with effusion (exudative) (serous) | — |
| Code first | — | underlying neoplasm (C00-D49) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources