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ICD-10 Guide
ICD-10 CodesA21.8

A21.8

Tularaemia, unspecified

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

Code Description

ICD-10 A21.8 is a billable code used to indicate a diagnosis of tularaemia, unspecified.

Key Diagnostic Point:

Tularaemia, also known as rabbit fever, is a zoonotic infection caused by the bacterium Francisella tularensis. This highly infectious organism can be transmitted to humans through various routes, including direct contact with infected animals, bites from infected insects, or inhalation of contaminated aerosols. The disease is characterized by a range of clinical manifestations, including fever, chills, headaches, and localized infections depending on the route of transmission. The most common forms of tularaemia include ulceroglandular, glandular, oculoglandular, and pneumonic types, but the unspecified code A21.8 is used when the specific type is not documented. Public health considerations are critical, as tularaemia is considered a potential bioterrorism agent due to its infectious nature and the severity of illness it can cause. Surveillance and control measures are essential to prevent outbreaks, particularly in areas where the disease is endemic, and among populations at risk, such as hunters and laboratory workers.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of clinical presentations requiring precise documentation
  • Potential for misdiagnosis with other zoonotic infections
  • Need for detailed patient history regarding exposure
  • Variability in laboratory confirmation methods

Audit Risk Factors

  • Inadequate documentation of exposure history
  • Failure to specify the type of tularaemia
  • Lack of laboratory confirmation in medical records
  • Inconsistent coding practices among providers

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, exposure risks, and laboratory results.

Common Clinical Scenarios

Patients presenting with fever and lymphadenopathy after exposure to wildlife.

Billing Considerations

Ensure that all clinical manifestations are documented to support the diagnosis.

Public Health

Documentation Requirements

Epidemiological data and outbreak reports.

Common Clinical Scenarios

Surveillance of tularaemia cases in endemic areas.

Billing Considerations

Documentation should include preventive measures and public health interventions.

Coding Guidelines

Inclusion Criteria

Use A21.8 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation
  • 8 should be used when the specific type of tularaemia is not documented
  • Ensure that all relevant clinical details are captured to avoid ambiguity

Exclusion Criteria

Do NOT use A21.8 When
No specific exclusions found.

Related CPT Codes

87070CPT Code

Culture, bacterial, any source

Clinical Scenario

Used when confirming a diagnosis of tularaemia.

Documentation Requirements

Document the source of the culture and clinical indications.

Specialty Considerations

Infectious disease specialists should ensure that cultures are properly labeled and handled.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of tularaemia, improving the accuracy of epidemiological tracking and treatment outcomes. The introduction of specific codes for different types of tularaemia enhances the ability to capture clinical nuances.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of tularaemia, improving the accuracy of epidemiological tracking and treatment outcomes. The introduction of specific codes for different types of tularaemia enhances the ability to capture clinical nuances.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of tularaemia, improving the accuracy of epidemiological tracking and treatment outcomes. The introduction of specific codes for different types of tularaemia enhances the ability to capture clinical nuances.

Resources

Clinical References

  • •
    Centers for Disease Control and Prevention (CDC) - Tularaemia

Coding & Billing References

  • •
    Centers for Disease Control and Prevention (CDC) - Tularaemia

Frequently Asked Questions

What is the primary cause of tularaemia?

Tularaemia is primarily caused by the bacterium Francisella tularensis, which can be transmitted to humans through contact with infected animals, bites from infected insects, or inhalation of contaminated aerosols.