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v1.0.0
ICD-10 Guide
ICD-10 CodesB26.8

B26.8

Mumps due to other specified mumps virus strains

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

Code Description

ICD-10 B26.8 is a billable code used to indicate a diagnosis of mumps due to other specified mumps virus strains.

Key Diagnostic Point:

Mumps is a viral infection caused by the mumps virus, which primarily affects the salivary glands, leading to swelling and pain. While the classic presentation involves parotitis, mumps can also cause complications such as orchitis, oophoritis, and meningitis. The code B26.8 is used when the mumps infection is attributed to other specified strains of the mumps virus, which may not be covered under the more common strain. Diagnostic methods include serological testing for mumps-specific IgM and IgG antibodies, PCR testing of saliva or cerebrospinal fluid, and viral culture. Antiviral treatments are generally supportive, as there are no specific antiviral medications for mumps; however, symptomatic relief can be provided through analgesics and hydration. Understanding the specific strain is crucial for epidemiological tracking and public health responses, especially in outbreaks.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation between mumps strains requires specific laboratory testing.
  • Documentation must specify the strain to justify the use of B26.8.
  • Potential for misclassification with other viral infections.
  • Requires knowledge of mumps vaccination history and outbreak status.

Audit Risk Factors

  • Inadequate documentation of the specific mumps strain.
  • Failure to include serological or PCR test results.
  • Misuse of the code for non-mumps viral infections.
  • Lack of clarity in clinical notes regarding complications.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed lab results, clinical presentation, and vaccination history.

Common Clinical Scenarios

Outbreak investigations, patients with atypical presentations.

Billing Considerations

Ensure documentation reflects the strain and any complications.

Pediatrics

Documentation Requirements

Vaccination status, clinical symptoms, and family history.

Common Clinical Scenarios

Children presenting with parotitis or complications post-vaccination.

Billing Considerations

Consideration of age and vaccination schedule in documentation.

Coding Guidelines

Inclusion Criteria

Use B26.8 When
  • Follow ICD
  • CM guidelines for coding infectious diseases
  • 8 should be used when the mumps virus strain is specified and documented

Exclusion Criteria

Do NOT use B26.8 When
  • Exclude cases where the strain is not identified or when the infection is due to a different virus

Related CPT Codes

86765CPT Code

Mumps antibody test

Clinical Scenario

Used to confirm mumps infection in patients with symptoms.

Documentation Requirements

Document the reason for testing and results.

Specialty Considerations

Infectious disease specialists may require additional epidemiological data.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 allows for more specific coding of mumps strains, improving epidemiological tracking and public health responses. B26.8 provides a mechanism to capture cases that may not fit the classic presentation.

ICD-9 vs ICD-10

The transition to ICD-10 allows for more specific coding of mumps strains, improving epidemiological tracking and public health responses. B26.8 provides a mechanism to capture cases that may not fit the classic presentation.

Reimbursement & Billing Impact

The transition to ICD-10 allows for more specific coding of mumps strains, improving epidemiological tracking and public health responses. B26.8 provides a mechanism to capture cases that may not fit the classic presentation.

Resources

Clinical References

  • •
    CDC Mumps Information

Coding & Billing References

  • •
    CDC Mumps Information

Frequently Asked Questions

When should I use B26.8 instead of B26.0?

Use B26.8 when the mumps infection is confirmed to be due to a specified strain other than the classic strain, as documented by laboratory testing.