I22 – Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction

ICD-10-CM 2027 diagnosis code · Ischemic heart diseases

Non-billable header

ICD-10-CM code I22
Code
I22 (claims format: I22)
Description
Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction
Short description
Subsequent STEMI & NSTEMI mocard infrc
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
9. Diseases of the circulatory system (I00-I99)
Block
I20-I25 Ischemic heart diseases

Billable codes under I22

I22 is a header code and cannot be used on claims. Choose the most specific code:

Notes for I22

Includes:
  • 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
Excludes1 (not coded here):
  • subsequent myocardial infarction, type 2 (I21.A1)
  • subsequent myocardial infarction of other type (type 3) (type 4) (type 5) (I21.A9)
Use additional code:
  • 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 inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block I20-I25

Code also:
  • the presence of hypertension (I10-I1A)

Frequently asked questions

What is ICD-10 code I22?

I22 is the ICD-10-CM code for subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction, in the block I20-I25 (Ischemic heart diseases).

Is I22 a billable code?

No. I22 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.