Excludes1 pair
J90 vs J94.0
J90 and J94.0 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 J90
chylous (pleural) effusion (J94.0)
J90
Pleural effusion, not elsewhere classified
BillableUnspecified
- Chapter 10
- Diseases of the respiratory system
- Section
- J90-J94
Use when the record says
- Encysted pleurisy
- Pleural effusion NOS
- Pleurisy with effusion (exudative) (serous)
Indexed under
- Effusion › pleura, pleurisy, pleuritic, pleuropericardial
- Pleurisy › pneumococcal
- Pleurisy › streptococcal
- Pleurisy › with › effusion
J94.0
Chylous effusion
Billable
- Chapter 10
- Diseases of the respiratory system
- Section
- J90-J94
Use when the record says
- Chyliform effusion
Indexed under
- Chylothorax (nonfilarial)
- Effusion › chylous, chyliform (pleura)
- Effusion › pleura, pleurisy, pleuritic, pleuropericardial › chylous, chyliform
- Pleurisy › with › effusion › chylous, chyliform
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