2019 ICD-10-CM Diagnosis Code I46.9

Cardiac arrest, cause unspecified

    2016 2017 2018 2019 Billable/Specific Code
  • I46.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM I46.9 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of I46.9 - other international versions of ICD-10 I46.9 may differ.
The following code(s) above I46.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to I46.9:
  • I00-I99
    2019 ICD-10-CM Range I00-I99

    Diseases of the circulatory system

    Type 2 Excludes
    • 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.-)
    Diseases of the circulatory system
  • I46
    ICD-10-CM Diagnosis Code I46

    Cardiac arrest

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • cardiogenic shock (R57.0)
    Cardiac arrest
Approximate Synonyms
  • Cardiac arrest
  • Cardiac arrest with successful resuscitation
Clinical Information
  • A disorder characterized by cessation of the pumping function of the heart.
  • Cardiac standstill or arrest; absence of a heartbeat.
  • Cessation of heart beat or myocardial contraction. If it is treated within a few minutes, heart arrest can be reversed in most cases to normal cardiac rhythm and effective circulation.
  • Cessation of the heart beat.
  • Sudden cessation of the pumping function of the heart, with disappearance of arterial blood pressure, connoting either ventricular fibrillation or ventricular standstill.
  • The heart has an internal electrical system that controls the rhythm of the heartbeat. Problems can cause abnormal heart rhythms, called arrhythmias. There are many types of arrhythmia. During an arrhythmia, the heart can beat too fast, too slow, or it can stop beating. Sudden cardiac arrest occurs when the heart develops an arrhythmia that causes it to stop beating. This is different than a heart attack, where the heart usually continues to beat but blood flow to the heart is blocked. There are many possible causes of cardiac arrest. They include coronary heart disease, heart attack, electrocution, drowning, or choking. There may not be a known cause to the cardiac arrest. Without medical attention, the person will die within a few minutes. People are less likely to die if they have early cardiopulmonary resuscitation (cpr) and defibrillation. Defibrillation is delivering an electric shock to restore the heart rhythm to normal.
  • The sudden cessation of cardiac activity so that the victim subject/patient becomes unresponsive, without normal breathing and no signs of circulation. Cardiac arrest may be reversed by cpr, and/or defibrillation, cardioversion or cardiac pacing.
ICD-10-CM I46.9 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 296 Cardiac arrest, unexplained with mcc or peripheral extracorporeal membrane oxygenation (ecmo)
  • 297 Cardiac arrest, unexplained with cc
  • 298 Cardiac arrest, unexplained without cc/mcc
  • 793 Full term neonate with major problems

Convert I46.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change

Diagnosis Index entries containing back-references to I46.9:

ICD-10-CM Codes Adjacent To I46.9
I45.4 Nonspecific intraventricular block
I45.5 Other specified heart block
I45.6 Pre-excitation syndrome
I45.8 Other specified conduction disorders
I45.81 Long QT syndrome
I45.89 Other specified conduction disorders
I45.9 Conduction disorder, unspecified
I46 Cardiac arrest
I46.2 Cardiac arrest due to underlying cardiac condition
I46.8 Cardiac arrest due to other underlying condition
I46.9 Cardiac arrest, cause unspecified
I47 Paroxysmal tachycardia
I47.0 Re-entry ventricular arrhythmia
I47.1 Supraventricular tachycardia
I47.2 Ventricular tachycardia
I47.9 Paroxysmal tachycardia, unspecified
I48 Atrial fibrillation and flutter
I48.0 Paroxysmal atrial fibrillation
I48.1 Persistent atrial fibrillation
I48.2 Chronic atrial fibrillation
I48.3 Typical atrial flutter

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.