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ICD-10 Guide
ICD-10 CodesA83.8

A83.8

Other tick-borne viral encephalitis

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

Code Description

ICD-10 A83.8 is a billable code used to indicate a diagnosis of other tick-borne viral encephalitis.

Key Diagnostic Point:

Other tick-borne viral encephalitis refers to a group of viral infections that affect the central nervous system (CNS) and are transmitted through tick bites. These infections can lead to severe neurological complications, including encephalitis, which is characterized by inflammation of the brain. Symptoms may include fever, headache, confusion, seizures, and neurological deficits. The condition is caused by various viruses, including those from the flavivirus family, and can present with a range of clinical manifestations. Diagnosis typically involves clinical evaluation, serological testing, and sometimes lumbar puncture to analyze cerebrospinal fluid (CSF). Vaccination status is crucial, as vaccines are available for some tick-borne viruses, such as the tick-borne encephalitis virus (TBEV). However, there is no specific antiviral treatment for these infections, and management is primarily supportive. Understanding the epidemiology of tick-borne diseases and the patient's vaccination history is essential for accurate diagnosis and treatment.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of tick-borne viruses that can cause similar symptoms
  • Need for precise documentation of neurological symptoms
  • Differentiation from other viral encephalitides
  • Potential for co-infections with other tick-borne diseases

Audit Risk Factors

  • Inadequate documentation of tick exposure
  • Failure to document vaccination status
  • Misclassification of the type of viral encephalitis
  • Lack of supporting lab results

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, including travel history and tick exposure, laboratory results, and vaccination status.

Common Clinical Scenarios

Patients presenting with fever, neurological symptoms, and a history of tick exposure.

Billing Considerations

Ensure thorough documentation of all symptoms and laboratory findings to support the diagnosis.

Neurology

Documentation Requirements

Neurological examination findings, imaging results, and CSF analysis.

Common Clinical Scenarios

Patients with acute encephalitis symptoms and neurological deficits.

Billing Considerations

Document the progression of neurological symptoms and any interventions performed.

Coding Guidelines

Inclusion Criteria

Use A83.8 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the patient's clinical presentation and laboratory findings
  • Include any relevant history of tick exposure and vaccination status

Exclusion Criteria

Do NOT use A83.8 When
No specific exclusions found.

Related CPT Codes

87491CPT Code

Viral detection by nucleic acid

Clinical Scenario

Used when testing for specific viral pathogens in suspected encephalitis cases.

Documentation Requirements

Document the reason for testing and any relevant clinical findings.

Specialty Considerations

Infectious disease specialists should ensure comprehensive documentation of the patient's history and symptoms.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of tick-borne viral encephalitis, improving the accuracy of data collection and epidemiological tracking. This specificity aids in better understanding the disease's impact and guiding public health responses.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of tick-borne viral encephalitis, improving the accuracy of data collection and epidemiological tracking. This specificity aids in better understanding the disease's impact and guiding public health responses.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of tick-borne viral encephalitis, improving the accuracy of data collection and epidemiological tracking. This specificity aids in better understanding the disease's impact and guiding public health responses.

Resources

Clinical References

  • •
    CDC Tickborne Diseases
  • •
    World Health Organization - Tick-borne Encephalitis

Coding & Billing References

  • •
    CDC Tickborne Diseases
  • •
    World Health Organization - Tick-borne Encephalitis

Frequently Asked Questions

What are the common symptoms of tick-borne viral encephalitis?

Common symptoms include fever, headache, confusion, seizures, and neurological deficits. Symptoms can vary based on the specific virus and the severity of the infection.

Is there a vaccine for tick-borne viral encephalitis?

Yes, vaccines are available for certain types of tick-borne viral encephalitis, particularly in endemic regions. Vaccination history is important for diagnosis and management.