ICD-10 Guide

B26.82

Mumps myocarditis

BILLABLE STATUSYes

IMPLEMENTATION DATEOctober 1, 2015

LAST UPDATED09/05/2025

Code Description

ICD-10 B26.82 is a billable code used to indicate a diagnosis of mumps myocarditis.

Key Diagnostic Point:

Mumps myocarditis is a rare but serious complication of mumps virus infection, characterized by inflammation of the heart muscle (myocardium) due to viral invasion. The mumps virus, an RNA virus belonging to the Paramyxoviridae family, primarily causes parotitis, but can also lead to systemic complications, including myocarditis. Patients may present with symptoms such as chest pain, palpitations, fatigue, and dyspnea. Diagnosis is typically confirmed through serological testing for mumps-specific IgM antibodies, PCR testing of blood or myocardial tissue, and echocardiography to assess cardiac function and structure. The condition can lead to significant morbidity, including heart failure or arrhythmias, particularly in individuals with pre-existing heart conditions. Treatment is primarily supportive, as there are no specific antiviral therapies for mumps myocarditis; however, symptomatic management may include the use of non-steroidal anti-inflammatory drugs (NSAIDs) and, in severe cases, corticosteroids to reduce inflammation. Vaccination against mumps is crucial for prevention, as it significantly reduces the incidence of the disease and its complications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

Requires understanding of viral infections and their complications.
Differentiation from other viral myocarditis conditions.
Need for accurate serological and PCR test results.
Documentation of clinical symptoms and diagnostic methods.

Audit Risk Factors

Inadequate documentation of viral testing.
Failure to link symptoms to the mumps diagnosis.
Misclassification of myocarditis type.
Lack of supporting clinical evidence for diagnosis.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed history of mumps infection, laboratory results, and clinical symptoms.

Common Clinical Scenarios

Patients presenting with myocarditis following a recent mumps infection.

Billing Considerations

Ensure clear documentation of the timeline of symptoms and viral testing results.

Cardiology

Documentation Requirements

Echocardiogram results, clinical assessment of heart function, and treatment plans.

Common Clinical Scenarios

Patients with chest pain and a history of viral infections.

Billing Considerations

Document any pre-existing heart conditions that may complicate the diagnosis.

Coding Guidelines

Inclusion Criteria

Use B26.82 When

Follow ICD
CM guidelines for coding infectious diseases and myocarditis
Ensure accurate documentation of the mumps virus as the underlying cause of myocarditis
Include any relevant laboratory findings and clinical symptoms

Exclusion Criteria

Do NOT use B26.82 When

No specific exclusions found.

Related CPT Codes

93000CPT Code

Electrocardiogram, ECG

Clinical Scenario

Used to assess cardiac function in suspected myocarditis cases.

Documentation Requirements

Document the reason for ECG and 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 myocarditis, improving the accuracy of data collection and reimbursement processes for related conditions.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of viral myocarditis, improving the accuracy of data collection and reimbursement processes for related conditions.

Reimbursement & Billing Impact

reimbursement processes for related conditions.

Resources

Clinical References

•
CDC Mumps Information

Coding & Billing References

•
CDC Mumps Information

Frequently Asked Questions

What are the common symptoms of mumps myocarditis?

Common symptoms include chest pain, palpitations, fatigue, and shortness of breath, often following a recent mumps infection.

ICD-10 B26.82 is a billable code used to indicate a diagnosis of mumps myocarditis.