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ICD-10 Guide
ICD-10 CodesI46.2

I46.2

Billable

Cardiac arrest due to underlying cardiac condition

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/06/2025

Code Description

ICD-10 I46.2 is a billable code used to indicate a diagnosis of cardiac arrest due to underlying cardiac condition.

Key Diagnostic Point:

Cardiac arrest due to underlying cardiac condition (I46.2) refers to a sudden cessation of cardiac function stemming from pre-existing heart diseases. Common underlying conditions include coronary artery disease, cardiomyopathy, arrhythmias, and valvular heart diseases. The clinical presentation may vary, but patients often exhibit symptoms such as chest pain, palpitations, shortness of breath, or syncope prior to the arrest. Anatomically, the heart's electrical conduction system may be compromised, leading to ineffective heartbeats and subsequent loss of circulation. Disease progression can be rapid; patients with chronic heart conditions may experience acute exacerbations that precipitate cardiac arrest. Diagnostic considerations include a thorough patient history, physical examination, electrocardiogram (ECG), echocardiography, and possibly cardiac catheterization to evaluate the underlying pathology. Early recognition and intervention are critical to improving outcomes in these patients.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires understanding of various cardiac conditions and their interplay.
  • Treatment complexity: Management may involve advanced life support, medications, and potential surgical interventions.
  • Documentation requirements: Detailed clinical documentation is necessary to support the diagnosis and treatment.
  • Coding specificity: Requires precise coding to differentiate from other types of cardiac arrest.

Audit Risk Factors

  • Common coding errors: Misidentification of the underlying cause or failure to document the specific cardiac condition.
  • Documentation gaps: Incomplete patient history or lack of supporting diagnostic tests.
  • Billing challenges: Potential denials if documentation does not clearly establish the link between the cardiac condition and the arrest.

Specialty Focus

Medical Specialties

Cardiology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Emergency Medicine

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Related ICD-10 Codes

Related CPT Codes

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The clinical significance of I46.2 lies in its association with high morbidity and mortality rates in patients with underlying cardiac conditions. Understanding the epidemiology of cardiac arrest can inform population health strategies aimed at prevention and early intervention. Quality measures may include timely access to emergency care and adherence to guidelines for managing cardiac conditions, ultimately influencing healthcare utilization patterns and improving patient outcomes.

ICD-9 vs ICD-10

The clinical significance of I46.2 lies in its association with high morbidity and mortality rates in patients with underlying cardiac conditions. Understanding the epidemiology of cardiac arrest can inform population health strategies aimed at prevention and early intervention. Quality measures may include timely access to emergency care and adherence to guidelines for managing cardiac conditions, ultimately influencing healthcare utilization patterns and improving patient outcomes.

Reimbursement & Billing Impact

Reimbursement considerations include the need for clear linkage between the cardiac condition and the arrest, as well as the interventions performed. Common denials may arise from insufficient documentation or failure to demonstrate medical necessity. Coders should ensure that all relevant clinical details are captured in the medical record to support the claim and avoid potential audits.

Resources

Clinical References

  • •
    ICD-10 Official Guidelines for I00-I99
  • •
    Clinical Documentation Requirements

Coding & Billing References

  • •
    ICD-10 Official Guidelines for I00-I99
  • •
    Clinical Documentation Requirements

Frequently Asked Questions

What specific conditions are covered by I46.2?

I46.2 encompasses cardiac arrest resulting from various underlying cardiac conditions, including but not limited to ischemic heart disease, heart failure, arrhythmias, and structural heart defects.

When should I46.2 be used instead of related codes?

I46.2 should be used when the cardiac arrest is directly attributable to a known cardiac condition, as opposed to I46.0, which is used when the cause is unspecified.

What documentation supports I46.2?

Documentation should include a detailed account of the patient's medical history, evidence of the underlying cardiac condition, results from diagnostic tests (like ECG or echocardiogram), and a clear narrative linking the condition to the cardiac arrest.