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ICD-10 Guide
ICD-10 CodesA85.0

A85.0

Dengue fever due to virus transmitted by Aedes mosquitoes

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

Code Description

ICD-10 A85.0 is a billable code used to indicate a diagnosis of dengue fever due to virus transmitted by aedes mosquitoes.

Key Diagnostic Point:

Dengue fever is a viral infection caused by the dengue virus, which is primarily transmitted through the bite of infected Aedes mosquitoes, particularly Aedes aegypti and Aedes albopictus. The disease is characterized by high fever, severe headache, pain behind the eyes, joint and muscle pain, rash, and mild bleeding. In some cases, dengue can progress to severe dengue, which can lead to serious complications such as hemorrhagic fever and dengue shock syndrome. Neurological complications, although rare, can occur, including encephalitis and myelitis, which may present with altered mental status or focal neurological deficits. The diagnosis is typically confirmed through serological tests or PCR. Vaccination against dengue is available and recommended in endemic areas, particularly for individuals who have had a previous dengue infection, as it may reduce the severity of subsequent infections. Proper documentation of vaccination status is crucial for accurate coding and management of the disease.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between dengue fever and other viral infections.
  • Identifying neurological complications that may arise.
  • Documenting vaccination status accurately.
  • Understanding the clinical presentation and progression of the disease.

Audit Risk Factors

  • Inadequate documentation of neurological symptoms.
  • Failure to document vaccination history.
  • Misclassification of dengue severity.
  • Lack of supporting laboratory test results.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed clinical notes on symptoms, laboratory results, and treatment plans.

Common Clinical Scenarios

Patients presenting with fever and rash after travel to endemic areas.

Billing Considerations

Ensure accurate documentation of travel history and vaccination status.

Neurology

Documentation Requirements

Comprehensive neurological assessments and imaging results.

Common Clinical Scenarios

Patients with neurological symptoms following dengue infection.

Billing Considerations

Document any neurological deficits and their progression.

Coding Guidelines

Inclusion Criteria

Use A85.0 When
  • According to ICD
  • 10 guidelines, A85
  • 0 should be used when the diagnosis of dengue fever is confirmed, and it is essential to document any neurological complications
  • existing conditions

Exclusion Criteria

Do NOT use A85.0 When
  • Exclude codes for other viral infections unless they are co

Related CPT Codes

86790CPT Code

Dengue virus serology

Clinical Scenario

Used to confirm dengue infection in symptomatic patients.

Documentation Requirements

Document the reason for testing and clinical symptoms.

Specialty Considerations

Infectious disease specialists should ensure comprehensive lab results are included.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of dengue fever and its complications, improving data accuracy and facilitating better patient management.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of dengue fever and its complications, improving data accuracy and facilitating better patient management.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of dengue fever and its complications, improving data accuracy and facilitating better patient management.

Resources

Clinical References

  • •
    CDC Dengue Information

Coding & Billing References

  • •
    CDC Dengue Information

Frequently Asked Questions

What are the common symptoms of dengue fever?

Common symptoms include high fever, severe headache, pain behind the eyes, joint and muscle pain, rash, and mild bleeding.

How is dengue fever diagnosed?

Dengue fever is diagnosed through clinical evaluation and confirmed with laboratory tests such as serology or PCR.