ICD-10 Code I24 – Other acute ischemic heart diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I24 – Other acute ischemic heart diseases
What it is
I24 groups acute ischemic heart conditions that are not classified elsewhere. Use it when the record describes an acute reduction in heart blood flow, but the documentation does not fit a more specific code.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include acute chest discomfort, ischemic ECG changes, or evidence of myocardial ischemia without a clearly documented infarction.
When to use this code
Use I24 when the provider documents an acute ischemic heart disease process and no more specific diagnosis is available. It may apply to unspecified acute ischemic syndromes or other acute ischemic cardiac conditions that are not separately classified. Check documentation for the exact ischemic diagnosis and whether a more specific code is supported.
Do not use for
Do not use this code for acute myocardial infarction, chronic ischemic heart disease, or angina without an acute ischemic diagnosis. If the chart supports a more specific condition, code that instead.
Coding tip
Review the provider’s final impression carefully and code the most specific acute ischemic heart diagnosis documented.