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ICD-10-CM category I46: Cardiac arrest

Category I46 is a heading in chapter 9 (Diseases of the circulatory system (I00-I99)), section Other forms of heart disease (I30-I5A). It is not billable; report one of the 3 complete codes below.

Notes that apply to every I46 code

Excludes2 (not part of this condition, may be coded together)
  • cardiogenic shock (R57.0)

Billable codes in I46

Billable FY2027 ICD-10-CM codes in category I46
CodeDescription
I46.2Cardiac arrest due to underlying cardiac condition
I46.8Cardiac arrest due to other underlying condition
I46.9Cardiac arrest, cause unspecified

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Codes from the FY2027 ICD-10-CM files (all chapters). Report the code that matches the documentation and the Official Guidelines; this list is not coding advice.