All ICD10 Codes

I22

Non-Billable
ChapterI00–I99
Rankcategory
Official Description

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

Use a more specific code (5 billable)
I22.0Subsequent ST elevation (STEMI) myocardial infarction of anterior wallI22.1Subsequent ST elevation (STEMI) myocardial infarction of inferior wallI22.2Subsequent non-ST elevation (NSTEMI) myocardial infarctionI22.8Subsequent ST elevation (STEMI) myocardial infarction of other sitesI22.9Subsequent ST elevation (STEMI) myocardial infarction of unspecified site
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 9: Diseases of the Circulatory System (I00-I99).

CH9 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

I20-I25 Parent Instructions

Code Also
  • the presence of hypertension (I10-I1A)

Instructional Notes

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. Use a different code.)
  • 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)

Clinical Hierarchy

BillableHas subcodes
CH9Diseases of the circulatory system (I00-I99)
I20-I25Ischemic heart diseases (I20-I25)
I22Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarctionNot billable
I22.0Subsequent ST elevation (STEMI) myocardial infarction of anterior wallBillable
I22.1Subsequent ST elevation (STEMI) myocardial infarction of inferior wallBillable
I22.2Subsequent non-ST elevation (NSTEMI) myocardial infarctionBillable
I22.8Subsequent ST elevation (STEMI) myocardial infarction of other sitesBillable
I22.9Subsequent ST elevation (STEMI) myocardial infarction of unspecified siteBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I22:

blockI20-I25
Ischemic heart diseases (I20-I25)
View context instructions
chapterCH9
Diseases of the circulatory system (I00-I99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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