Excludes1 pair
J70.3 vs J84.2
J70.3 and J84.2 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on J70.3
lymphoid interstitial pneumonia (J84.2)
J70.3
Chronic drug-induced interstitial lung disorders
Billable
- Chapter 10
- Diseases of the respiratory system
- Section
- J60-J70
Indexed under
- Disorder › lung, interstitial, drug-induced › chronic
- Pneumonitis › chemotherapy › chronic
J84.2
Lymphoid interstitial pneumonia
Billable
- Chapter 10
- Diseases of the respiratory system
- Section
- J80-J84
Use when the record says
- Lymphoid interstitial pneumonitis
Indexed under
- Pneumonia › lymphoid interstitial
- Pneumonitis › lymphoid, interstitial
- Pneumonia › interstitial › lymphoid
- Pneumonitis › interstitial › lymphoid
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