ICD-10-CM 2027 diagnosis code
I24.89Other forms of acute ischemic heart disease
I24.89 is a valid, billable ICD-10-CM code for other forms of acute ischemic heart disease. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Demand coronary ischemia.
Code last changed in FY2024 (effective October 1, 2023). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About I24.89
I24.89 is the ICD-10-CM diagnosis code for other forms of acute ischemic heart disease. It belongs to category I24 (other acute ischemic heart diseases), block I20-I25 (ischemic heart diseases) and chapter 9 (diseases of the circulatory system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within I24.8, choose I24.89 (Other forms of acute ischemic heart disease) only when documentation doesn't support a more specific option: acute coronary microvascular dysfunction (I24.81).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 311 (Angina Pectoris, relative weight 0.6684), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It was added in FY2024, effective October 1, 2023.
Notes that apply from higher levels
Instructions written at a parent level also apply to I24.89.
› From I24.8 Other forms of acute ischemic heart disease
- myocardial infarction due to demand ischemia (I21.A1)
Broader instructions also apply from I20-I25 Ischemic heart diseases and Chapter 9: Diseases of the circulatory system.
Alphabetic index entries
4 entriesTerms in the official ICD-10-CM index that lead to I24.89.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 05 · Diseases and Disorders of the Circulatory System
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2024 (effective 10/1/2023): Added
- No changes since FY2024.
Common questions about I24.89
Is I24.89 billable?
- Yes. I24.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I24.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I24.89 as a principal diagnosis.
Is I24.89 a CC or MCC?
- I24.89 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does I24.89 group to?
- I24.89 is used in the MS-DRG v44.0 logic for MS-DRG 311 (Angina Pectoris). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.