ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesA87.0

A87.0

Venezuelan equine encephalitis.

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

Code Description

ICD-10 A87.0 is a billable code used to indicate a diagnosis of venezuelan equine encephalitis..

Key Diagnostic Point:

Venezuelan equine encephalitis (VEE) is a viral infection caused by the Venezuelan equine encephalitis virus (VEEV), which primarily affects horses but can also infect humans. The virus is transmitted through the bite of infected mosquitoes, particularly in tropical and subtropical regions of the Americas. In humans, VEE can lead to a range of neurological complications, including fever, headache, and in severe cases, encephalitis, which is characterized by inflammation of the brain. Symptoms may appear 2 to 10 days after exposure and can include confusion, seizures, and altered mental status. The disease can progress rapidly, leading to serious complications such as coma or death, particularly in vulnerable populations. Vaccination against VEE is available and is recommended for individuals at high risk, such as those working in endemic areas or with horses. Early diagnosis and supportive care are crucial for improving outcomes in affected individuals. The clinical presentation can vary widely, making it essential for healthcare providers to consider VEE in differential diagnoses when patients present with neurological symptoms in endemic regions.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and severity of symptoms.
  • Differentiation from other viral encephalitides.
  • Need for thorough documentation of exposure history.
  • Potential for co-infection with other arboviruses.

Audit Risk Factors

  • Inadequate documentation of exposure history.
  • Failure to document vaccination status.
  • Misclassification of symptoms as non-specific viral illness.
  • Lack of detailed neurological assessment in records.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, including travel and exposure history, vaccination status, and neurological assessment.

Common Clinical Scenarios

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

Billing Considerations

Consideration of differential diagnoses and potential co-infections.

Neurology

Documentation Requirements

Comprehensive neurological examination findings, imaging results, and laboratory tests.

Common Clinical Scenarios

Patients with acute encephalitis symptoms requiring neurological evaluation.

Billing Considerations

Documentation of neurological deficits and progression of symptoms.

Coding Guidelines

Inclusion Criteria

Use A87.0 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of clinical findings, exposure history, and vaccination status
  • Include any relevant laboratory results and imaging studies that support the diagnosis

Exclusion Criteria

Do NOT use A87.0 When
No specific exclusions found.

Related CPT Codes

87491CPT Code

Viral detection by nucleic acid (DNA or RNA)

Clinical Scenario

Used for confirming VEE diagnosis through laboratory testing.

Documentation Requirements

Document the reason for testing and any relevant clinical findings.

Specialty Considerations

Infectious disease specialists should ensure comprehensive documentation of clinical context.

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 the ability to track and manage cases of this viral infection. The increased specificity aids in epidemiological studies and resource allocation for prevention and treatment.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of Venezuelan equine encephalitis, improving the ability to track and manage cases of this viral infection. The increased specificity aids in epidemiological studies and resource allocation for prevention and treatment.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of Venezuelan equine encephalitis, improving the ability to track and manage cases of this viral infection. The increased specificity aids in epidemiological studies and resource allocation for prevention and treatment.

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, muscle pain, and in severe cases, neurological symptoms such as confusion, seizures, and altered mental status.

How is Venezuelan equine encephalitis diagnosed?

Diagnosis is based on clinical presentation, exposure history, and laboratory confirmation through serological tests or PCR.

Is there a vaccine for Venezuelan equine encephalitis?

Yes, a vaccine is available and is recommended for individuals at high risk, particularly those working in endemic areas or with horses.