All ICD10 Codes

I21.4

Billable
ChapterI00–I99
Ranksubcategory
Official Description

Non-ST elevation (NSTEMI) myocardial infarction

Metadata & Insights
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 9: Diseases of the Circulatory System (I00-I99).

Instructional Notes

Includes
  • Acute subendocardial myocardial infarction
  • Non-Q wave myocardial infarction NOS
  • Nontransmural myocardial infarction NOS
  • Type 1 non-ST elevation myocardial infarction
General instructions are available for the parent sections:
View CH9 NotesView I20-I25 NotesView I21 Notes

Clinical Hierarchy

BillableHas subcodes
CH9Diseases of the circulatory system (I00-I99)
I20-I25Ischemic heart diseases (I20-I25)
I21Acute myocardial infarction
I21.4Non-ST elevation (NSTEMI) myocardial infarctionBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I21.4:

categoryI21
Acute myocardial infarction
View context instructions
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 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 280
Acute Myocardial Infarction, Discharged Alive with MCC
DRG 281
Acute Myocardial Infarction, Discharged Alive with CC
DRG 282
Acute Myocardial Infarction, Discharged Alive without CC/MCC
DRG 283
Acute Myocardial Infarction, Expired with MCC
DRG 284
Acute Myocardial Infarction, Expired with CC
DRG 285
Acute Myocardial Infarction, Expired without CC/MCC

Cross Reference

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