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ICD-10 Guide
ICD-10 CodesA87

A87

Viral meningitis

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

Code Description

ICD-10 A87 is a billable code used to indicate a diagnosis of viral meningitis.

Key Diagnostic Point:

Viral meningitis is an inflammation of the protective membranes covering the brain and spinal cord, primarily caused by viral infections. Common viral agents include enteroviruses, herpes simplex virus, and mumps virus. Symptoms typically include fever, headache, stiff neck, and sensitivity to light. Unlike bacterial meningitis, viral meningitis is generally less severe and often resolves without specific treatment. Diagnosis is usually confirmed through lumbar puncture, which reveals an elevated white blood cell count with a predominance of lymphocytes, normal glucose levels, and negative bacterial cultures. While most patients recover fully, some may experience neurological complications such as seizures or cognitive deficits. Vaccination status plays a crucial role in prevention; for instance, vaccines against mumps and measles can reduce the incidence of viral meningitis caused by these pathogens. Understanding the nuances of viral meningitis is essential for accurate coding and appropriate clinical management.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation from bacterial meningitis
  • Variety of viral pathogens involved
  • Potential for neurological complications
  • Need for precise documentation of symptoms and lab results

Audit Risk Factors

  • Inadequate documentation of symptoms
  • Failure to specify the viral agent
  • Misclassification as bacterial meningitis
  • Omission of vaccination history

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed history of symptoms, laboratory results, and vaccination status.

Common Clinical Scenarios

Patients presenting with fever, headache, and neck stiffness.

Billing Considerations

Ensure accurate identification of the viral agent and any neurological sequelae.

Neurology

Documentation Requirements

Neurological examination findings, imaging results, and follow-up assessments.

Common Clinical Scenarios

Patients with post-viral complications such as seizures or cognitive changes.

Billing Considerations

Document any neurological deficits and their impact on daily functioning.

Coding Guidelines

Inclusion Criteria

Use A87 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the viral agent when known
  • Include any relevant symptoms and complications

Exclusion Criteria

Do NOT use A87 When
  • Exclude cases of bacterial meningitis or other specified conditions

Related Codes

Child Codes

5 codes
A87.0
Venezuelan equine encephalitis.
A87.1
Japanese encephalitis
A87.2
Venezuelan equine encephalitis
A87.8
Other viral encephalitis, not elsewhere classified
A87.9
Viral meningitis, unspecified

Related CPT Codes

62270CPT Code

Lumbar puncture

Clinical Scenario

Used to obtain CSF for analysis in suspected meningitis cases.

Documentation Requirements

Document indication for procedure, patient consent, and results of CSF analysis.

Specialty Considerations

Ensure that the procedure is performed by qualified personnel and that results are interpreted by a specialist.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of viral meningitis, improving data accuracy and enabling better tracking of viral infections and their complications.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of viral meningitis, improving data accuracy and enabling better tracking of viral infections and their complications.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of viral meningitis, improving data accuracy and enabling better tracking of viral infections and their complications.

Resources

Clinical References

  • •
    CDC Viral Meningitis Information

Coding & Billing References

  • •
    CDC Viral Meningitis Information

Frequently Asked Questions

What are the common causes of viral meningitis?

Common causes include enteroviruses, herpes simplex virus, mumps virus, and West Nile virus. Enteroviruses are the most frequent culprits, especially in children.