Is I24.9 a billable ICD-10-CM code?

Yes. I24.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does I24.9 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 I24.9?

I24.9 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

I24.9

I24.9 — Acute ischemic heart disease, unspecified

Billable / specific codeICD-10-CM

I24.9 is a billable, specific ICD-10-CM code for acute ischemic heart disease, unspecified. 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.

ischemic heart disease (chronic) NOS (I25.9)

Risk adjustment

I24.9 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

I24.9 is named in 21 Medicare coverage policies — 21 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
A56476Billing and Coding: Cardiac Radionuclide Imaging
A56476Billing and Coding: Cardiac Radionuclide Imaging
A56494Billing and Coding: Cardiovascular Nuclear Medicine

How I24.9 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 I24.9.

Cyanotic heart disease
Ischemia, ischemic›heart›acute or with a stated duration of 4 weeks or less
Ischemia, ischemic›heart›subacute
Syndrome›coronary›acute NEC

Related codes at this level

Codes that share I24. If I24.9 is not quite right, the correct code is usually one of these.

Questions about I24.9

Is I24.9 a billable ICD-10-CM code?: Yes. I24.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I24.9 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 I24.9?: I24.9 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.