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ICD-10 Guide
DiagnosesAortic Valve Calcification

Aortic Valve Calcification

ICD-10 Coding for Aortic Valve Calcification(I35.0, I35.9)

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

Diagnosis Overview

What is Aortic Valve Calcification?
Essential facts and insights about Aortic Valve Calcification

Key Clinical Considerations:

  • Patients may present with symptoms such as chest pain, shortness of breath, or fatigue, particularly during exertion.
  • Echocardiography may reveal thickening and calcification of the aortic valve, with possible stenosis or regurgitation.
  • Physical examination may show a systolic ejection murmur or signs of heart failure.
  • Transesophageal echocardiography or cardiac CT may provide detailed imaging of the aortic valve structure and function.
  • Severity can be assessed based on the degree of aortic stenosis or regurgitation, classified as mild, moderate, or severe.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must include a clear diagnosis of aortic valve calcification, supported by clinical findings and imaging results.
  • Specific terminology such as 'aortic stenosis' or 'aortic regurgitation' should be documented when applicable.
  • Examples include noting the degree of calcification and any associated symptoms or complications.
  • Documentation must demonstrate medical necessity for any procedures or treatments related to the diagnosis.
  • Quality measures may require documentation of symptom assessment, functional status, and treatment outcomes.

Coding Guidelines

Usage Guidelines & Examples

  • Use I35.0 for aortic valve stenosis due to calcification and I35.9 for unspecified aortic valve disease.
  • Do not use these codes for conditions like mitral valve disease or other non-aortic valve issues.
  • I35.0 and I35.9 are related to other codes in the I35 category, such as I35.2 (aortic valve stenosis with regurgitation).
  • Common errors include misclassifying the severity of stenosis or failing to document associated conditions.
  • In complex cases, consider the patient's overall cardiac function and any coexisting valvular diseases.

Code Exclusions

Important Exclusions

  • Excludes conditions such as rheumatic heart disease (I05) and congenital aortic valve anomalies (Q23.1).
  • Alternative codes for excluded conditions include I05.9 for rheumatic heart disease, unspecified.
  • Conditions are excluded due to differing etiologies and treatment approaches.
  • Common mistakes include misclassifying rheumatic heart disease as aortic valve calcification.
  • Related but distinct conditions include mitral valve calcification and tricuspid valve disease.

Related ICD-10 Codes

Primary Codes
I35.0
Aortic valve stenosis due to calcification
I35.9
Unspecified aortic valve disease
Ancillary Codes
Q23.83
Differential Codes
I06.0
I06.0
if stenosis is due to rheumatic fever.

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 aortic valve calcification, often seen in older adults or those with a history of rheumatic fever.
  • Patient populations include older adults, particularly those over 70, and individuals with risk factors such as hyperlipidemia or diabetes.
  • Clinical settings include outpatient cardiology clinics, inpatient hospital settings, and emergency departments.
  • Specialty-specific applications are relevant in cardiology, particularly in managing valvular heart disease.
  • Treatment contexts include surgical interventions like aortic valve replacement or transcatheter aortic valve implantation (TAVI).

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 aortic valve calcification based on echocardiographic findings of thickening and stenosis.'

Template 2

Template: 'Clinical presentation consistent with aortic valve disease including exertional dyspnea and fatigue.'

Template 3

Template: 'Diagnostic criteria for aortic stenosis met as evidenced by a peak aortic jet velocity of >4 m/s.'

Template 4

Template: 'Treatment plan initiated for aortic valve stenosis with referral for surgical evaluation.'

Template 5

Template: 'Follow-up care for aortic valve calcification including monitoring of symptoms and echocardiographic assessment.'

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?

Documentation must include clinical findings, imaging results, and any associated symptoms.

How does this differ from similar diagnoses?

Aortic valve calcification specifically refers to calcification of the aortic valve, while other diagnoses may involve different valves or conditions.

What are common billing considerations?

Ensure that the diagnosis is clearly linked to the services provided to optimize reimbursement.

What procedures are typically associated?

Commonly associated procedures include echocardiography, cardiac catheterization, and valve replacement surgeries.

Are there any quality reporting implications?

Quality measures may include tracking outcomes related to valve replacement and patient symptom assessments.