I46.9 — Cardiac arrest, cause unspecified
I46.9 is a billable, specific ICD-10-CM code for cardiac arrest, cause unspecified. It is valid for submission on a claim.
Risk adjustment
I46.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 213 Cardio-Respiratory Failure and Shock0.370 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
I46.9 is named in 23 Medicare coverage policies — 23 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52458Automatic External Defibrillators - Policy Article
- A52458Automatic External Defibrillators - Policy Article
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
How I46.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I46.9.
- Arrest, arrested›cardiac
Related codes at this level
Codes that share I46. If I46.9 is not quite right, the correct code is usually one of these.
Questions about I46.9
- Is I46.9 a billable ICD-10-CM code?
- Yes. I46.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I46.9 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Other forms of heart disease (I30-I5A).