I24.89 — Other forms of acute ischemic heart disease
I24.89 is a billable, specific ICD-10-CM code for other forms of acute ischemic heart disease. It is valid for submission on a claim.
Risk adjustment
I24.89 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
I24.89 is named in 50 Medicare coverage policies — 50 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
- A53775Billing and Coding: Frequency and Duration for Cardiac Rehabilitation and Intensive Cardiac Rehabilitation
- A56423Billing and Coding: Cardiology Non-emergent Outpatient Stress Testing
How I24.89 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 I24.89.
- Insufficiency, insufficient›coronary(acute or subacute)
- Ischemia, ischemic›demand(coronary)
- Insufficiency, insufficient›arterial›coronary(acute or subacute)
- Disease, diseased›heart›ischemic›specified form NEC›acute
Related codes at this level
Codes that share I24.8. If I24.89 is not quite right, the correct code is usually one of these.
Questions about I24.89
- Is I24.89 a billable ICD-10-CM code?
- Yes. I24.89 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I24.89 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Ischemic heart diseases (I20-I25).