ICD-10 Diagnosis Code I46.9

Cardiac arrest, cause unspecified

Diagnosis Code I46.9

ICD-10: I46.9
Short Description: Cardiac arrest, cause unspecified
Long Description: Cardiac arrest, cause unspecified
This is the 2018 version of the ICD-10-CM diagnosis code I46.9

Valid for Submission
The code I46.9 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Diseases of the circulatory system (I00–I99)
    • Other forms of heart disease (I30-I52)
      • Cardiac arrest (I46)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code I46.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Asystole
  • Atrial standstill
  • Cardiac arrest
  • Cardiac arrest after obstetrical surgery AND/OR other procedure including delivery
  • Cardiac arrest AND/OR failure following anesthesia AND/OR sedation in labor AND/OR delivery
  • Cardiac arrest with successful resuscitation
  • Circulatory arrest
  • Collapse
  • Complication of obstetrical surgery AND/OR procedure
  • Electrocardiographic asystole
  • Electromechanical dissociation
  • Hypoxic ischemic encephalopathy
  • Hypoxic ischemic encephalopathy due to cardiac arrest
  • Hypoxic-ischemic coma
  • Idiopathic cardiac arrest
  • Obstetrical cardiac complication of anesthesia AND/OR sedation
  • On examination - collapse -cardiac arrest
  • Post-cardiorespiratory arrest coma
  • Sinus arrest
  • Sinus node dysfunction

Information for Patients

Cardiac Arrest

Also called: SCA, Sudden cardiac death

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 (SCA) 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 SCA. They include coronary heart disease, physical stress, and some inherited disorders. Sometimes there is no known cause for the SCA.

Without medical attention, the person will die within a few minutes. People are less likely to die if they have early defibrillation. Defibrillation sends an electric shock to restore the heart rhythm to normal. You should give cardiopulmonary resuscitation (CPR) to a person having SCA until defibrillation can be done.

If you have had an SCA, an implantable cardiac defibrillator (ICD) reduces the chance of dying from a second SCA.

NIH: National Heart, Lung, and Blood Institute

  • Cardiac arrest (Medical Encyclopedia)

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