FY2027
MenuClose
Excludes1 pair

I24.1 vs I30-

I24.1 and I30 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 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
  • Syndrome › Dressler's (postmyocardial infarction)
  • 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