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ICD-10-CM 2027 diagnosis code

I22Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction

Not billable — use a more specific code

I22 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.Short description: Subsequent STEMI & NSTEMI mocard infrc

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 I22

I22 is the ICD-10-CM diagnosis code for subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction. 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 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: I22.0 (wall), I22.1 (wall), I22.2 (infarction), I22.8 (sites) and I22.9 (site).

Don't report I22 together with the conditions in its Excludes1 note: subsequent myocardial infarction, type 2 (I21.A1) and subsequent myocardial infarction of other type (type 3) (type 4) (type 5) (I21.A9).

Use an additional code, if applicable, to identify: exposure to environmental tobacco smoke (Z77.22), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31), status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82), tobacco dependence (F17.-) and 1 more.

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 I22

Coding notes

IncludesFurther defines the content of the category
  • acute myocardial infarction occurring within four weeks (28 days) of a previous acute myocardial infarction, regardless of site
  • cardiac infarction
  • coronary (artery) embolism
  • coronary (artery) occlusion
  • coronary (artery) rupture
  • coronary (artery) thrombosis
  • infarction of heart, myocardium, or ventricle
  • recurrent myocardial infarction
  • reinfarction of myocardium
  • rupture of heart, myocardium, or ventricle
  • subsequent type 1 myocardial infarction
Excludes1Not coded here — never report together with this code
  • subsequent myocardial infarction, type 2 (I21.A1)
  • subsequent myocardial infarction of other type (type 3) (type 4) (type 5) (I21.A9)
Use additional codeAdd a secondary code to fully describe the condition
  • code, if applicable, to identify:
  • exposure to environmental tobacco smoke (Z77.22)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Notes that apply from higher levels

Instructions written at a parent level also apply to I22.

Broader instructions also apply from I20-I25 Ischemic heart diseases and Chapter 9: Diseases of the circulatory system.

Codes whose notes reference I22

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about I22

Is I22 billable?

No. I22 is a header code. Report one of its more specific subcodes instead.