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v1.0.0
ICD-10 Guide
ICD-10 CodesB33

B33

Viral carditis

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 B33 is a billable code used to indicate a diagnosis of viral carditis.

Key Diagnostic Point:

Viral carditis is an inflammation of the heart muscle (myocardium) caused by viral infections. It can result from various viruses, including Coxsackievirus, adenovirus, parvovirus B19, and cytomegalovirus (CMV). The condition may present with symptoms such as chest pain, fatigue, palpitations, and shortness of breath. Diagnosis typically involves a combination of clinical evaluation, electrocardiogram (ECG), echocardiography, and serological tests to identify the specific viral pathogen. In some cases, cardiac MRI may be utilized to assess myocardial inflammation. Treatment primarily focuses on managing symptoms and may include antiviral medications, although specific antiviral therapy is limited for many viral infections. Supportive care, including the use of nonsteroidal anti-inflammatory drugs (NSAIDs) and corticosteroids, may also be indicated in severe cases. Early recognition and appropriate management are crucial to prevent complications such as heart failure or arrhythmias.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of viral pathogens that can cause carditis
  • Overlap with other cardiac conditions (e.g., myocarditis)
  • Need for specific diagnostic tests to confirm viral etiology
  • Potential for misdiagnosis with other inflammatory heart diseases

Audit Risk Factors

  • Inadequate documentation of viral etiology
  • Failure to document clinical symptoms and diagnostic tests
  • Misclassification of viral carditis as non-viral myocarditis
  • Lack of follow-up documentation for treatment response

Specialty Focus

Medical Specialties

Cardiology

Documentation Requirements

Detailed clinical history, diagnostic test results, and treatment plans must be documented.

Common Clinical Scenarios

Patients presenting with chest pain, arrhythmias, or heart failure symptoms.

Billing Considerations

Ensure clear documentation of the viral etiology and any associated cardiac dysfunction.

Infectious Disease

Documentation Requirements

Documentation of viral testing results and treatment protocols.

Common Clinical Scenarios

Patients with known viral infections presenting with cardiac symptoms.

Billing Considerations

Document the correlation between viral infection and cardiac symptoms to support coding.

Coding Guidelines

Inclusion Criteria

Use B33 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the viral etiology and associated symptoms
  • Include any relevant diagnostic tests performed to support the diagnosis

Exclusion Criteria

Do NOT use B33 When
No specific exclusions found.

Related Codes

Child Codes

11 codes
B33.0
Epidemic myalgia
B33.1
Shingles (herpes zoster) of eyelid
B33.2
Herpesviral Meningitis
B33.20
Viral carditis, unspecified
B33.21
Viral endocarditis
B33.22
Viral myocarditis
B33.23
Viral pericarditis
B33.24
Viral cardiomyopathy
B33.3
Postherpetic polyneuropathy
B33.4
Herpesviral encephalitis
B33.8
Other specified viral diseases

Related CPT Codes

93000CPT Code

Electrocardiogram, ECG

Clinical Scenario

Used to evaluate cardiac function in patients with suspected viral carditis.

Documentation Requirements

Document the indication for the ECG and any findings.

Specialty Considerations

Cardiology specialists should ensure ECG findings correlate with clinical symptoms.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of viral carditis, improving the accuracy of data collection and reimbursement processes. It enables better tracking of viral infections and their impact on cardiac health.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of viral carditis, improving the accuracy of data collection and reimbursement processes. It enables better tracking of viral infections and their impact on cardiac health.

Reimbursement & Billing Impact

reimbursement processes. It enables better tracking of viral infections and their impact on cardiac health.

Resources

Clinical References

  • •
    CDC Viral Carditis Information

Coding & Billing References

  • •
    CDC Viral Carditis Information

Frequently Asked Questions

What are the common viruses that cause viral carditis?

Common viruses include Coxsackievirus, adenovirus, parvovirus B19, and cytomegalovirus. Each virus may present with different clinical features and require specific diagnostic tests.

How is viral carditis diagnosed?

Diagnosis typically involves a combination of clinical evaluation, ECG, echocardiography, and serological tests to identify the specific viral pathogen. Cardiac MRI may also be used in certain cases.

What treatments are available for viral carditis?

Treatment primarily focuses on symptom management and may include antiviral medications, NSAIDs, and corticosteroids in severe cases. Supportive care is essential for recovery.