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ICD-10 Guide
DiagnosesAcute On Chronic Heart Failure With Preserved Ejection Fraction

Acute On Chronic Heart Failure With Preserved Ejection Fraction

ICD-10 Coding for Acute on Chronic Heart Failure with Preserved Ejection Fraction(I50.33)

PRIMARY SPECIALTYCardiology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Acute On Chronic Heart Failure With Preserved Ejection Fraction?
Essential facts and insights about Acute on Chronic Heart Failure with Preserved Ejection Fraction

Key Clinical Considerations:

  • Presence of symptoms such as dyspnea, fatigue, and edema that indicate acute exacerbation of chronic heart failure.
  • Elevated levels of natriuretic peptides (BNP or NT-proBNP) in laboratory tests.
  • Physical examination findings may include elevated jugular venous pressure, pulmonary crackles, and peripheral edema.
  • Imaging findings may include chest X-ray showing pulmonary congestion or echocardiogram demonstrating preserved ejection fraction.
  • Severity criteria may include New York Heart Association (NYHA) functional classification indicating worsening heart failure symptoms.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must document the acute exacerbation of chronic heart failure with preserved ejection fraction.
  • Specific terminology such as 'acute on chronic heart failure' and 'preserved ejection fraction' must be used.
  • Examples include noting the patient's history of chronic heart failure and the acute symptoms observed during the visit.
  • Documentation must demonstrate medical necessity for treatment, including rationale for hospitalization or interventions.
  • Quality measures may require documentation of symptom assessment and treatment response.

Coding Guidelines

Usage Guidelines & Examples

  • Use this diagnosis code when a patient presents with acute symptoms on a background of chronic heart failure with preserved ejection fraction.
  • Do not use this code for patients with acute heart failure without a chronic component or with reduced ejection fraction.
  • Similar codes include I50.32 (Acute on chronic heart failure with reduced ejection fraction) and I50.30 (Heart failure, unspecified).
  • Common coding errors include misclassifying the type of heart failure or failing to document the chronic component.
  • In complex cases, ensure that both acute and chronic components are clearly documented to support code selection.

Code Exclusions

Important Exclusions

  • Conditions explicitly excluded include acute heart failure without chronic history and heart failure with reduced ejection fraction.
  • Alternative codes for excluded conditions may include I50.31 for acute heart failure or I50.32 for acute on chronic heart failure with reduced ejection fraction.
  • Conditions are excluded to ensure accurate representation of the patient's clinical status and treatment needs.
  • Common exclusion mistakes include failing to document the chronic nature of heart failure or misidentifying the ejection fraction status.
  • Related but distinct conditions include pulmonary edema or cardiogenic shock, which may require different coding.

Related ICD-10 Codes

Primary Codes
I50.33
Acute on chronic heart failure with preserved ejection fraction
I50.32
Acute on chronic heart failure with reduced ejection fraction
Ancillary Codes
I11.0
Differential Codes
I50.32
I50.813

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Cardiology

Specialty Applications

  • This diagnosis applies to patients with a history of chronic heart failure who experience acute exacerbations.
  • Patient populations include older adults, individuals with a history of cardiovascular disease, and those with risk factors such as obesity or diabetes.
  • Clinical settings include inpatient hospital admissions, outpatient cardiology visits, and emergency department evaluations.
  • Specialty-specific applications are relevant in cardiology, geriatrics, and primary care settings.
  • Treatment contexts include management of acute symptoms, optimization of heart failure medications, and potential hospitalization.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Patient diagnosed with acute on chronic heart failure with preserved ejection fraction based on clinical findings of dyspnea and edema.'

Template 2

Template: 'Clinical presentation consistent with acute on chronic heart failure including worsening fatigue and pulmonary congestion.'

Template 3

Template: 'Diagnostic criteria for acute on chronic heart failure met as evidenced by elevated BNP levels and echocardiogram results.'

Template 4

Template: 'Treatment plan initiated for acute on chronic heart failure with diuretics and monitoring of fluid status.'

Template 5

Template: 'Follow-up care for acute on chronic heart failure including regular assessments of heart function and symptom management.'

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this diagnosis?

Detailed documentation should include acute symptoms, chronic heart failure history, and relevant diagnostic findings.

How does this differ from similar diagnoses?

This diagnosis specifically indicates preserved ejection fraction, differentiating it from cases with reduced ejection fraction.

What are common billing considerations?

Reimbursement may depend on clear documentation of acute exacerbation and medical necessity for treatment.

What procedures are typically associated?

Related CPT codes may include echocardiograms, BNP testing, and hospital admission procedures.

Are there any quality reporting implications?

Quality measures may include tracking symptom management and treatment effectiveness in heart failure patients.