1. ICD-10-CM Codes
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2. I00-I99
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3. I30-I5A
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4. I46-
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5. 2023 ICD-10-CM Diagnosis Code I46.9

2023 ICD-10-CM Diagnosis Code I46.9

Cardiac arrest, cause unspecified

2016 2017 2018 2019 2020 2021 2022 2023 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 2023 edition of ICD-10-CM I46.9 became effective on October 1, 2022.
• This is the American ICD-10-CM version of I46.9 - other international versions of ICD-10 I46.9 may differ.

• Cardiac arrest
• Cardiac arrest with successful resuscitation

• 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.

• 296 Cardiac arrest, unexplained with mcc
• 297 Cardiac arrest, unexplained with cc
• 298 Cardiac arrest, unexplained without cc/mcc
• 791 Prematurity with major problems
• 793 Full term neonate with major problems

Convert I46.9 to ICD-9-CM

• 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
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change

• Arrest, arrested
  • cardiac I46.9

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