I24.1 vs I30
I24.1 and I30 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 I30
Dressler's syndrome (I24.1)
I24.1
Dressler's syndrome
Billable
- Chapter 9
- Diseases of the circulatory system
- Section
- I20-I25
Use when the record says
- Postmyocardial infarction syndrome
Indexed under
- Dressler's syndrome
- Pericarditis › postinfarction (with decompensation) (with effusion)
- Syndrome › Dressler's
- Syndrome › postinfarction
- Syndrome › postmyocardial infarction
I30
Acute pericarditis
Not billable
- Chapter 9
- Diseases of the circulatory system
- Section
- I30-I5A
Use when the record says
- acute mediastinopericarditis
- acute myopericarditis
- acute pericardial effusion
- acute pleuropericarditis
- acute pneumopericarditis
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