J70.4 vs J84
J70.4 and J84 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 J84
drug-induced interstitial lung disorders (J70.2-J70.4)
J70.4
Drug-induced interstitial lung disorders, unspecified
BillableUnspecified
- Chapter 10
- Diseases of the respiratory system
- Section
- J60-J70
Indexed under
- Disorder › lung, interstitial, drug-induced (of)
- Pneumonitis › chemotherapy (acute) (primary)
J84
Other interstitial pulmonary diseases
Not billable
- Chapter 10
- Diseases of the respiratory system
- Section
- J80-J84
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