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ICD-10 Guide
ICD-10 CodesI50.33

I50.33

Billable

Acute on chronic diastolic (congestive) heart failure

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

Code Description

ICD-10 I50.33 is a billable code used to indicate a diagnosis of acute on chronic diastolic (congestive) heart failure.

Key Diagnostic Point:

Acute on chronic diastolic heart failure (HF) is a condition characterized by the sudden exacerbation of chronic diastolic heart failure, where the heart's ability to fill with blood during diastole is impaired. This condition often presents with symptoms such as shortness of breath, fatigue, and fluid retention, leading to pulmonary congestion and peripheral edema. The anatomy involved primarily includes the left ventricle, which fails to relax adequately, resulting in increased pressures in the heart and lungs. Disease progression can be influenced by factors such as hypertension, coronary artery disease, and diabetes, which can lead to worsening heart function over time. Diagnostic considerations include echocardiography to assess diastolic function, natriuretic peptide levels to evaluate heart failure severity, and clinical assessment of symptoms. The acute nature of this condition necessitates prompt medical intervention to prevent further complications and improve patient outcomes.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires comprehensive assessment of heart function and symptomatology.
  • Treatment complexity: Involves management of acute exacerbations and underlying chronic conditions.
  • Documentation requirements: Detailed clinical documentation is necessary to support the diagnosis.
  • Coding specificity: Requires accurate coding to differentiate from other types of heart failure.

Audit Risk Factors

  • Common coding errors: Misclassification of acute versus chronic heart failure.
  • Documentation gaps: Incomplete clinical notes regarding symptom severity and treatment response.
  • Billing challenges: Potential denials due to insufficient documentation supporting the acute nature of the condition.

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

Internal 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

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

Acute on chronic diastolic heart failure significantly impacts patient quality of life and healthcare utilization, often leading to increased hospital admissions and readmissions. It is a prevalent condition among older adults and those with comorbidities, contributing to the overall burden of cardiovascular diseases. Effective management and coding of this condition are crucial for improving patient outcomes and optimizing healthcare resources.

ICD-9 vs ICD-10

Acute on chronic diastolic heart failure significantly impacts patient quality of life and healthcare utilization, often leading to increased hospital admissions and readmissions. It is a prevalent condition among older adults and those with comorbidities, contributing to the overall burden of cardiovascular diseases. Effective management and coding of this condition are crucial for improving patient outcomes and optimizing healthcare resources.

Reimbursement & Billing Impact

Reimbursement considerations include the severity of the condition and the complexity of care, which may affect the level of service billed. Common denials may arise from insufficient documentation or failure to demonstrate the acute exacerbation. Coders should ensure that all relevant clinical data is captured to support the diagnosis and justify the services rendered.

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 I50.33?

I50.33 covers acute exacerbations of chronic diastolic heart failure, typically seen in patients with a history of heart failure who present with worsening symptoms such as dyspnea and edema.

When should I50.33 be used instead of related codes?

I50.33 should be used when a patient with chronic diastolic heart failure experiences an acute worsening of symptoms, differentiating it from stable chronic heart failure or acute systolic heart failure.

What documentation supports I50.33?

Documentation should include a detailed history of heart failure symptoms, recent changes in clinical status, diagnostic test results (e.g., echocardiogram, BNP levels), and treatment plans addressing the acute exacerbation.