J18 vs J68.0
J18 and J68.0 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on J18
pneumonitis due to fumes and vapors (J68.0)
J18
Pneumonia, unspecified organism
Not billable
- Chapter 10
- Diseases of the respiratory system
- Section
- J09-J18
J68.0
Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
Billable
- Chapter 10
- Diseases of the respiratory system
- Section
- J60-J70
Use when the record says
- Chemical bronchitis (acute)
Indexed under
- Bronchitis › chemical (diffuse) (fibrinous) (hypostatic) (infective) (membranous)
- Bronchitis › due to gases, fumes or vapors (diffuse) (fibrinous) (hypostatic) (infective) (membranous)
- Pneumonia › nitrogen dioxide (acute) (double) (migratory) (purulent) (septic) (unresolved)
- Pneumonitis › chemical (acute) (primary)
- Pneumonitis › crack (acute) (primary)
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027