ICD-10-CM 2027 diagnosis code
I24Other acute ischemic heart diseases
I24 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About I24
I24 is the ICD-10-CM diagnosis code for other acute ischemic heart diseases. It belongs to block I20-I25 (ischemic heart diseases) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: I24.0 (infarction), I24.1 (syndrome), I24.8 (disease) and I24.9 (unspecified).
Don't report I24 together with the conditions in its Excludes1 note: angina pectoris (I20.-) and transient myocardial ischemia in newborn (P29.4).
The conditions in its Excludes2 note aren't part of I24, but may be coded alongside it if the patient has both: non-ischemic myocardial injury (I5A).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under I24
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to I24.
Broader instructions also apply from I20-I25 Ischemic heart diseases and Chapter 9: Diseases of the circulatory system.
Codes whose notes reference I24
- I5AExcludes2
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about I24
Is I24 billable?
- No. I24 is a header code. Report one of its more specific subcodes instead.