Excludes1 pair
I24.0 vs I25-
I24.0 and I25 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 distinction is acute vs chronic.
The official note, declared on I24.0
atherosclerotic heart disease (I25.1-)
I24.0
Acute coronary thrombosis not resulting in myocardial infarction
Billable
- Chapter 9
- Diseases of the circulatory system
- Section
- I20-I25
Use when the record says
- Acute coronary (artery) (vein) embolism not resulting in myocardial infarction
- Acute coronary (artery) (vein) occlusion not resulting in myocardial infarction
- Acute coronary (artery) (vein) thromboembolism not resulting in myocardial infarction
Indexed under
- Occlusion, occluded › artery › coronary (acute) (thrombotic) (without myocardial infarction)
- Occlusion, occluded › coronary › not resulting in infarction
- Thrombosis, thrombotic › coronary › not resulting in infarction
- Thrombosis, thrombotic › parietal › not resulting in infarction
- Thrombosis, thrombotic › ventricle › not resulting in infarction
I25
Chronic ischemic heart disease
Not billable
- Chapter 9
- Diseases of the circulatory system
- Section
- I20-I25
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