I24.0 — Acute coronary thrombosis not resulting in myocardial infarction
I24.0 is a billable, specific ICD-10-CM code for acute coronary thrombosis not resulting in myocardial infarction. It is valid for submission on a claim.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- atherosclerotic heart disease (I25.1-)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- 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
Other codes that can never be billed with I24.0
These codes carry an Excludes1 note pointing at I24.0. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I24.0 alone.
- I25.82Chronic total occlusion of coronary artery
Risk adjustment
I24.0 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 229 Unstable Angina and Other Acute Ischemic Heart Disease0.240 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
I24.0 is named in 53 Medicare coverage policies — 53 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A56423Billing and Coding: Cardiology Non-emergent Outpatient Stress Testing
- A56423Billing and Coding: Cardiology Non-emergent Outpatient Stress Testing
How I24.0 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I24.0.
- 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
- Embolism›artery›coronary›not resulting in infarction
- Thrombosis, thrombotic›artery, arteries›coronary›not resulting in infarction
Related codes at this level
Codes that share I24. If I24.0 is not quite right, the correct code is usually one of these.
Questions about I24.0
- Is I24.0 a billable ICD-10-CM code?
- Yes. I24.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I24.0 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Ischemic heart diseases (I20-I25).
- What cannot be coded together with I24.0?
- I24.0 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.