Cardiac arrest

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ICD10 Diagnosis
Dx: Cardiac arrest
ICD10 code: I46.9
Pre-ICD10 counterpart: Unwitnessed Cardiac Arrest, Witnessed Cardiac Arrest
Charlson/ALERT Scale: none
APACHE Como Component: none
APACHE Acute Component: Cardiac Arrest
External ICD10 Documentation
This diagnosis is a part of ICD10 collection.


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Como Admit Acquired Primary Limits 1/ Dx grouping - this is part of both of those discussion

  • Should we be coding cardiac arrest as a comorb if they have a past history of cardiac arrest? Or is it considered resolved? Some of us are coding it as a comorb and some of us aren't. Thanks - Brynn
    • TT note: See Controlling Dx Type for ICD10 codes - we can instruct not to code this specific code as a comorbid, but the problem is likely more widespread and should be addressed that way; Just leaving it here as an example.
  • SMW


  • Cargo


  • Categories

Additional Info

  • Code when
    • a non-perfusing rhythm occurs and
    • the patient is given BCLS or ACLS (i.e. receives CPR of some sort) or receives defibrillation or cardioversion
  • Thus do not code this if no treatment is given for the arrest -- this is different than our usual rule to code diagnoses even if no treatment is given, and the reason is that EVERY death at some point includes the heart stopping (cardiac arrest) and we would therefore be using this code for every death, which we do not want to do.
  • Combine this code with the INITIAL rhythm observed during the code, which may include:
  • Also code Targeted Temperature Management (TTM) if applicable.
  • Do NOT code this as a comorbid condition.

Alternate ICD10s to consider coding instead or in addition

Arrhythmia codes:

Candidate Combined ICD10 codes

Related CCI Codes

Data Integrity Checks

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