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 CodesA21.9

A21.9

Tularemia, unspecified

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

Code Description

ICD-10 A21.9 is a billable code used to indicate a diagnosis of tularemia, unspecified.

Key Diagnostic Point:

Tularemia is an infectious disease caused by the bacterium Francisella tularensis, which is classified as a zoonotic infection due to its transmission from animals to humans. The disease can manifest in various forms, including ulceroglandular, glandular, oculoglandular, oropharyngeal, and pneumonic, depending on the route of exposure. Common transmission vectors include ticks, deer flies, and contact with infected animals, particularly rabbits and rodents. Humans can contract tularemia through bites, inhalation of contaminated aerosols, or direct contact with infected tissues. The clinical presentation can vary widely, with symptoms ranging from fever, chills, and fatigue to more severe manifestations such as pneumonia or septicemia. Diagnosis is typically confirmed through serological tests or culture of the organism. Public health considerations are paramount, as tularemia is a potential bioterrorism agent and can lead to outbreaks in specific geographic areas. Surveillance and control measures are essential to prevent transmission, especially in endemic regions.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of clinical presentations requiring careful documentation
  • Potential for misdiagnosis with other zoonotic infections
  • Need for specific laboratory confirmation for accurate coding
  • Variability in symptoms based on transmission route

Audit Risk Factors

  • Inadequate documentation of clinical presentation
  • Failure to specify the transmission route
  • Lack of laboratory confirmation in medical records
  • Misclassification of tularemia as another infectious disease

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed clinical history, laboratory results, and treatment plans must be documented.

Common Clinical Scenarios

Patients presenting with fever and lymphadenopathy after exposure to wildlife.

Billing Considerations

Ensure that all potential exposure routes are documented to support the diagnosis.

Public Health

Documentation Requirements

Surveillance data and outbreak reports must be accurately recorded.

Common Clinical Scenarios

Investigation of clusters of tularemia cases in specific geographic areas.

Billing Considerations

Collaboration with epidemiologists to ensure accurate reporting and coding.

Coding Guidelines

Inclusion Criteria

Use A21.9 When
  • According to ICD
  • 10 guidelines, tularemia is classified under A21
  • 9 when the specific type is not documented
  • Coders should ensure that the diagnosis aligns with clinical findings and laboratory results

Exclusion Criteria

Do NOT use A21.9 When
  • Exclusion criteria include other specified infectious diseases

Related CPT Codes

87070CPT Code

Culture, bacterial, any source

Clinical Scenario

When laboratory confirmation of tularemia is required.

Documentation Requirements

Document the source of the culture and clinical suspicion of tularemia.

Specialty Considerations

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

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of tularemia, enabling better tracking of the disease and its epidemiology. However, the unspecified nature of A21.9 can lead to challenges in accurately capturing the disease burden.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of tularemia, enabling better tracking of the disease and its epidemiology. However, the unspecified nature of A21.9 can lead to challenges in accurately capturing the disease burden.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

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

Coding & Billing References

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

Frequently Asked Questions

What are the common symptoms of tularemia?

Common symptoms include fever, chills, fatigue, swollen lymph nodes, and in some cases, pneumonia or skin ulcers depending on the route of infection.

How is tularemia transmitted?

Tularemia is primarily transmitted through bites from infected ticks or deer flies, direct contact with infected animals, or inhalation of contaminated aerosols.

What is the treatment for tularemia?

The primary treatment for tularemia is antibiotics, with streptomycin being the first-line therapy. Other antibiotics such as doxycycline may also be effective.