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ICD-10 Guide
ICD-10 CodesA68.1

A68.1

Epidemic louse-borne typhus

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

Code Description

ICD-10 A68.1 is a billable code used to indicate a diagnosis of epidemic louse-borne typhus.

Key Diagnostic Point:

Epidemic louse-borne typhus is an infectious disease caused by the bacterium Rickettsia prowazekii, which is transmitted to humans through the bites of infected body lice (Pediculus humanus corporis). This disease is characterized by sudden onset of fever, chills, headache, and rash, which typically appears on the trunk and spreads to the extremities. The disease can lead to severe complications, including pneumonia, renal failure, and even death if not treated promptly. Epidemic typhus is often associated with overcrowded and unsanitary living conditions, making it more prevalent in areas experiencing war, famine, or natural disasters. The geographic distribution of epidemic louse-borne typhus is primarily in regions with poor hygiene and high population density, particularly in parts of Africa, Central and South America, and Eastern Europe. The disease can be effectively treated with antibiotics, but early diagnosis and intervention are crucial to prevent severe outcomes.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires knowledge of specific transmission vectors (lice).
  • Differentiation from other rickettsial diseases.
  • Understanding of geographic prevalence and risk factors.
  • Need for accurate clinical documentation to support diagnosis.

Audit Risk Factors

  • Inadequate documentation of clinical symptoms.
  • Failure to note the epidemiological context.
  • Misdiagnosis or coding of similar febrile illnesses.
  • Lack of supporting laboratory results.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed clinical history, symptomatology, and exposure history.

Common Clinical Scenarios

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

Billing Considerations

Consideration of co-infections and other rickettsial diseases.

Public Health

Documentation Requirements

Epidemiological data and outbreak reports.

Common Clinical Scenarios

Surveillance of outbreaks in crowded settings.

Billing Considerations

Focus on prevention strategies and community health education.

Coding Guidelines

Inclusion Criteria

Use A68.1 When
  • Follow the official ICD
  • CM coding guidelines for infectious diseases, ensuring accurate documentation of symptoms, exposure history, and laboratory findings
  • Include any relevant co
  • morbid conditions that may affect treatment

Exclusion Criteria

Do NOT use A68.1 When
No specific exclusions found.

Related CPT Codes

87470CPT Code

Infectious agent detection by nucleic acid (DNA or RNA); Rickettsia species

Clinical Scenario

Used when laboratory confirmation of Rickettsia infection is required.

Documentation Requirements

Laboratory results must be documented in the medical record.

Specialty Considerations

Infectious disease specialists should ensure comprehensive testing.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of epidemic louse-borne typhus, improving the ability to track and manage outbreaks and enhance public health reporting.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of epidemic louse-borne typhus, improving the ability to track and manage outbreaks and enhance public health reporting.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of epidemic louse-borne typhus, improving the ability to track and manage outbreaks and enhance public health reporting.

Resources

Clinical References

  • •
    CDC - Epidemic Typhus

Coding & Billing References

  • •
    CDC - Epidemic Typhus

Frequently Asked Questions

What are the common symptoms of epidemic louse-borne typhus?

Common symptoms include sudden onset of fever, chills, headache, myalgia, and a rash that typically starts on the trunk and spreads to the extremities.

How is epidemic louse-borne typhus diagnosed?

Diagnosis is typically made based on clinical presentation, exposure history, and confirmed through serological tests or PCR for Rickettsia prowazekii.