I24.89 Other forms of acute ischemic heart disease
The ICD-10-CM code for Other forms of acute ischemic heart disease is I24.89 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- I20-I25: Ischemic heart diseases (I20-I25)
- Category I24
- 7 codes (5 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to I24.89:
- Insufficiency, insufficient › coronary (acute or subacute)
- Ischemia, ischemic › demand (coronary)
- Insufficiency, insufficient › arterial › coronary (acute or subacute)
- Disease, diseased › heart (organic) › ischemic (chronic or with a stated duration of over 4 weeks) › specified form NEC › acute
U.S. Hospital Utilization
- An estimated 118,685 U.S. inpatient stays in 2023 included I24.89 among the documented diagnoses.
- 740 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
Type 2 MI: assign I21.A1; code underlying cause first; do not use I24.89Type 2 myocardial infarction (myocardial infarction due to demand ischemia or secondary to ischemic imbalance) is assigned to code I21.A1, Myocardial infarction type 2 with the underlying cause coded first, if applicable. Do not assign code I24.89, Other forms of acute ischemic heart disease, for the demand ischemia. If a type 2 AMI is described as NSTEMI or STEMI, only assign code I21.A1. Codes I21.01-I21.4 should only be assigned for type 1 AMIs.
Presumed relationship due to Index term “with”The classification presumes a causal relationship between hypertension and heart involvement and between hypertension and kidney involvement, as the two conditions are linked by the term “with” in the Alphabetic Index. These conditions should be coded as related even in the absence of provider documentation explicitly linking them, unless the documentation clearly states the conditions are unrelated.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026