Excludes1 pair
I23.7 vs I24.1
I23.7 and I24.1 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 I24.1
postinfarction angina (I23.7)
I23.7
Postinfarction angina
Billable
- Chapter 9
- Diseases of the circulatory system
- Section
- I20-I25
Indexed under
- Angina › following acute myocardial infarction
- Angina › post-infarctional
- Complication › following › acute myocardial infarction NEC › angina
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
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