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ICD-10 Guide
ICD-10 CodesA87.2

A87.2

Venezuelan equine encephalitis

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

Code Description

ICD-10 A87.2 is a billable code used to indicate a diagnosis of venezuelan equine encephalitis.

Key Diagnostic Point:

Venezuelan equine encephalitis (VEE) is a viral disease caused by the Venezuelan equine encephalitis virus (VEEV), which is primarily transmitted to humans through the bite of infected mosquitoes. The disease is characterized by inflammation of the central nervous system (CNS), leading to symptoms such as fever, headache, and neurological manifestations including confusion, seizures, and in severe cases, coma. The clinical presentation can vary widely, with some individuals experiencing mild flu-like symptoms while others may develop acute encephalitis. Neurological complications can include long-term cognitive deficits and motor impairments. Vaccination against VEE is available and is particularly recommended for individuals at high risk, such as those living in or traveling to endemic areas. The disease is more prevalent in certain regions of South America and the Caribbean, and outbreaks can occur, necessitating public health surveillance and response. Accurate diagnosis is crucial, often requiring serological testing or PCR to confirm the presence of the virus. Given the potential for severe outcomes, timely medical intervention is essential.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and severity of symptoms
  • Need for differential diagnosis with other viral encephalitides
  • Documentation of vaccination status and exposure history
  • Potential for co-infection with other arboviruses

Audit Risk Factors

  • Inadequate documentation of clinical symptoms
  • Failure to document vaccination status
  • Misdiagnosis or lack of differential diagnosis
  • Insufficient laboratory confirmation details

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, including travel history and vaccination status, as well as laboratory test results.

Common Clinical Scenarios

Patients presenting with fever and neurological symptoms after travel to endemic areas.

Billing Considerations

Consideration of other arboviral infections and the need for serological testing.

Neurology

Documentation Requirements

Neurological examination findings, imaging results, and treatment plans.

Common Clinical Scenarios

Patients with acute encephalitis symptoms requiring neurological evaluation.

Billing Considerations

Documentation of neurological deficits and follow-up assessments.

Coding Guidelines

Inclusion Criteria

Use A87.2 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of clinical findings, laboratory results, and vaccination history

Exclusion Criteria

Do NOT use A87.2 When
  • Exclude cases where the diagnosis is not confirmed or where symptoms are attributable to other conditions

Related CPT Codes

86787CPT Code

Viral serology for arboviruses

Clinical Scenario

Used when testing for VEE and other arboviral infections.

Documentation Requirements

Document the reason for testing and any relevant clinical findings.

Specialty Considerations

Infectious disease specialists should ensure comprehensive testing for differential diagnoses.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of Venezuelan equine encephalitis, improving data collection and epidemiological tracking of the disease.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of Venezuelan equine encephalitis, improving data collection and epidemiological tracking of the disease.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of Venezuelan equine encephalitis, improving data collection and epidemiological tracking of the disease.

Resources

Clinical References

  • •
    CDC - Venezuelan Equine Encephalitis

Coding & Billing References

  • •
    CDC - Venezuelan Equine Encephalitis

Frequently Asked Questions

What are the common symptoms of Venezuelan equine encephalitis?

Common symptoms include fever, headache, confusion, seizures, and in severe cases, coma. The severity can vary widely among individuals.

Is there a vaccine for Venezuelan equine encephalitis?

Yes, there is a vaccine available, particularly recommended for individuals at high risk, such as those living in or traveling to endemic areas.