DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

I46 Cardiac arrest

  • Header · not billable

I46 is not billable. The category heads 3 billable codes in FY2027: the 3 codes directly below it.

Index → code

  • Arrest, arrestedcardiac → I46.9
  • Arrest, arrestedcardiacdue tocardiac condition → I46.2
  • Arrest, arrestedcardiacdue tospecified condition NEC → I46.8

Where it sits

  1. Chapter 9 Diseases of the circulatory system (I00-I99)
  2. I30-I5A Other forms of heart disease (I30-I5A)
  3. I46 Cardiac arrest
Billable codes
3
Subdivisions
3
CC / MCC codes
0 / 3
HCC V28 codes
3
New FY2027
0
Index entries
3

Codes in I46

  1. I46.2
    Cardiac arrest due to underlying cardiac condition
    BillableMCC†213
    Code first 1

    Code first

    • underlying cardiac condition
  2. I46.8
    Cardiac arrest due to other underlying condition
    BillableMCC†213
    Code first 1

    Code first

    • underlying condition
  3. I46.9
    Cardiac arrest, cause unspecified
    BillableMCC†213

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card). † MCC only if the patient is discharged alive; otherwise neither CC nor MCC (Appendix C Part 2).

Sources of each column.

Instructions

At I46

Excludes2

  • cardiogenic shock (R57.0) R57.0

Notes that also apply

Chapter 9 instructions (Excludes2 10): printed on the chapter 9 page.

Index entries

  • Arrest, arrestedcardiac → I46.9
  • Arrest, arrestedcardiacdue tocardiac condition → I46.2
  • Arrest, arrestedcardiacdue tospecified condition NEC → I46.8

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy