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ICD-10 Guide
ICD-10 CodesI35.8

I35.8

Billable

Other nonrheumatic aortic valve disorders

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

Code Description

ICD-10 I35.8 is a billable code used to indicate a diagnosis of other nonrheumatic aortic valve disorders.

Key Diagnostic Point:

I35.8 refers to 'Other nonrheumatic aortic valve disorders,' which encompasses a variety of conditions affecting the aortic valve that are not caused by rheumatic fever. The aortic valve, located between the left ventricle and the aorta, plays a crucial role in regulating blood flow from the heart to the rest of the body. Disorders in this category may include aortic regurgitation, aortic stenosis, and other structural abnormalities that can lead to significant hemodynamic changes. Clinical presentation often includes symptoms such as dyspnea, fatigue, and chest pain, which may progress to heart failure if left untreated. Diagnostic considerations involve echocardiography, cardiac MRI, and sometimes cardiac catheterization to assess valve function and the severity of the disorder. Understanding the anatomy and function of the aortic valve is essential for accurate diagnosis and management of these conditions, as they can lead to serious complications, including arrhythmias and sudden cardiac death.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires imaging studies and clinical evaluation to differentiate from other heart conditions.
  • Treatment complexity: Management may involve medical therapy or surgical intervention, depending on severity.
  • Documentation requirements: Requires detailed clinical notes and imaging reports to support diagnosis.
  • Coding specificity: Must differentiate between various types of aortic valve disorders.

Audit Risk Factors

  • Common coding errors: Misclassification of aortic valve disorders.
  • Documentation gaps: Incomplete clinical notes or lack of imaging results.
  • Billing challenges: Denials may arise from insufficient documentation or unclear diagnosis.

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

Cardiothoracic Surgery

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 I35.8 lies in its potential to lead to severe cardiovascular complications if not properly managed. Population health impact includes a growing prevalence of aortic valve disorders, particularly in aging populations, which can increase healthcare utilization and costs. Quality measures focus on timely diagnosis and appropriate management to improve patient outcomes, while epidemiological considerations highlight the need for awareness and early intervention in at-risk populations.

ICD-9 vs ICD-10

The clinical significance of I35.8 lies in its potential to lead to severe cardiovascular complications if not properly managed. Population health impact includes a growing prevalence of aortic valve disorders, particularly in aging populations, which can increase healthcare utilization and costs. Quality measures focus on timely diagnosis and appropriate management to improve patient outcomes, while epidemiological considerations highlight the need for awareness and early intervention in at-risk populations.

Reimbursement & Billing Impact

Reimbursement considerations include the complexity of the condition and the interventions performed. Common denials may occur if documentation does not clearly establish the medical necessity for procedures or if the diagnosis is not well-supported. Best practices include ensuring that all clinical notes, imaging results, and treatment plans are complete and accurately reflect the patient's condition to avoid billing challenges.

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 I35.8?

I35.8 includes various nonrheumatic aortic valve disorders such as degenerative aortic stenosis, congenital aortic valve anomalies, and other structural abnormalities not related to rheumatic fever.

When should I35.8 be used instead of related codes?

I35.8 should be used when the aortic valve disorder does not fit the specific definitions of I35.0 or I35.1, indicating a need for broader classification of nonrheumatic conditions.

What documentation supports I35.8?

Documentation should include clinical evaluations, echocardiographic findings, and any relevant imaging studies that confirm the diagnosis of a nonrheumatic aortic valve disorder.