B39.0 vs J99
B39.0 (Acute pulmonary histoplasmosis capsulati) compared with J99 (Respiratory disorders 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. J99 carries an Excludes1 note covering B39.0: “histoplasmosis (B39.0-B39.2)”
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
| B39.0Acute pulmonary histoplasmosis capsulati | J99Respiratory disorders in diseases classified elsewhere | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | J00-J99 — Diseases of the Respiratory System (J00-J99) |
| Definition | Acute pulmonary histoplasmosis capsulati is a billable ICD-10-CM diagnosis code (B39.0). | Respiratory disorders in diseases classified elsewhere is a billable ICD-10-CM diagnosis code (J99). |
| Use additional code | code for any associated manifestations, such as: endocarditis (I39) meningitis (G02) | — |
| Code first | associated AIDS (B20) | underlying disease, such as: amyloidosis (E85.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources