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.
Excludes1 inherited from the categories above I24.89
These are not written on I24.89, but they bind it: a note on a category applies to every code beneath it. Billing I24.89 with anything listed here is a denial.
Excludes2 inherited from the categories above I24.89
Also inherited, and the opposite of Excludes1: these conditions are not part of I24.89, but a patient can have both, so you may code both.
Written on I24 — Other acute ischemic heart diseases
- non-ischemic myocardial injury (I5A)
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
Code history
I24.89 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
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).
- What cannot be coded together with I24.89?
- I24.89 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above I24.89 (I24.8, I24) and apply to it just the same.