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ICD-10 Guide
ICD-10 CodesI34.9

I34.9

Billable

Nonrheumatic mitral valve disorder, unspecified

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

Code Description

ICD-10 I34.9 is a billable code used to indicate a diagnosis of nonrheumatic mitral valve disorder, unspecified.

Key Diagnostic Point:

Nonrheumatic mitral valve disorder, unspecified, refers to a range of conditions affecting the mitral valve that are not caused by rheumatic fever. The mitral valve, located between the left atrium and left ventricle of the heart, plays a crucial role in maintaining unidirectional blood flow. Disorders of this valve can lead to significant hemodynamic changes, resulting in symptoms such as dyspnea, fatigue, palpitations, and in severe cases, heart failure. The etiology of nonrheumatic mitral valve disorders may include degenerative changes, such as mitral valve prolapse, ischemic heart disease, or congenital abnormalities. Disease progression can vary widely; some patients may remain asymptomatic for years, while others may experience rapid deterioration. Diagnosis typically involves echocardiography, which assesses valve structure and function, and may be supplemented by cardiac MRI or CT scans for detailed anatomical visualization. Clinical management may range from monitoring to surgical interventions, depending on the severity of the condition and associated symptoms.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity
  • Treatment complexity
  • Documentation requirements
  • Coding specificity

Audit Risk Factors

  • Common coding errors
  • Documentation gaps
  • Billing challenges

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

Nonrheumatic mitral valve disorders can significantly impact patient quality of life and healthcare utilization. These conditions may lead to increased hospitalizations, surgical interventions, and long-term management strategies. Understanding the epidemiology of these disorders is essential for population health initiatives, as they can contribute to heart failure and other cardiovascular complications. Quality measures related to the management of mitral valve disorders are critical for improving patient outcomes and reducing healthcare costs.

ICD-9 vs ICD-10

Nonrheumatic mitral valve disorders can significantly impact patient quality of life and healthcare utilization. These conditions may lead to increased hospitalizations, surgical interventions, and long-term management strategies. Understanding the epidemiology of these disorders is essential for population health initiatives, as they can contribute to heart failure and other cardiovascular complications. Quality measures related to the management of mitral valve disorders are critical for improving patient outcomes and reducing healthcare costs.

Reimbursement & Billing Impact

reimbursement and to ensure that the coding aligns with the clinical documentation to avoid audits and denials.

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 I34.9?

I34.9 encompasses various nonrheumatic mitral valve disorders, including but not limited to degenerative mitral valve disease, mitral valve prolapse, and congenital mitral valve anomalies. It is used when the specific type of disorder is not clearly defined.

When should I34.9 be used instead of related codes?

I34.9 should be used when the specific nature of the mitral valve disorder is unknown or unspecified. If the condition can be accurately classified under a more specific code, such as I34.0 or I34.1, those codes should be utilized.

What documentation supports I34.9?

Documentation must include clinical findings, echocardiographic results, and any relevant history that indicates the presence of a nonrheumatic mitral valve disorder. Clear notes on symptoms and treatment plans are essential for supporting the use of this code.