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v1.0.0
ICD-10 Guide
ICD-10 CodesA01

A01

Typhoid and paratyphoid fevers

BILLABLE STATUSNo
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/04/2025

Code Description

ICD-10 A01 is a used to indicate a diagnosis of typhoid and paratyphoid fevers.

Key Diagnostic Point:

Typhoid and paratyphoid fevers are systemic infections caused by Salmonella typhi and Salmonella paratyphi, respectively, characterized by prolonged fever, abdominal pain, and gastrointestinal symptoms.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Severity of symptoms
  • Potential for complications

Audit Risk Factors

    Specialty Focus

    Medical Specialties

    Infectious Disease

    Documentation Requirements

    Detailed patient history including travel and exposure history, laboratory test results.

    Common Clinical Scenarios

    Patients presenting with fever, abdominal pain, and diarrhea after travel to endemic areas.

    Billing Considerations

    Consider vaccination history and antibiotic resistance patterns.

    Coding Guidelines

    Inclusion Criteria

    Use A01 When
    • Ensure accurate documentation of symptoms and travel history; use additional codes for complications if present

    Exclusion Criteria

    Do NOT use A01 When
    No specific exclusions found.

    Related Codes

    Child Codes

    12 codes
    A01.0
    Typhoid fever
    A01.00
    Typhoid fever, unspecified
    A01.01
    Typhoid meningitis
    A01.02
    Typhoid fever with heart involvement
    A01.03
    Typhoid pneumonia
    A01.04
    Typhoid arthritis
    A01.05
    Typhoid osteomyelitis
    A01.09
    Typhoid fever with other complications
    A01.1
    Paratyphoid fever A
    A01.2
    Paratyphoid fever B
    A01.3
    Paratyphoid fever C
    A01.4
    Paratyphoid fever, unspecified

    Related CPT Codes

    87045CPT Code

    Culture, bacterial, any source

    Clinical Scenario

    Testing for Salmonella in patients with suspected typhoid or paratyphoid fever.

    Documentation Requirements

    Document clinical symptoms and any relevant travel history.

    Specialty Considerations

    Infectious disease specialists may require additional tests for antibiotic susceptibility.

    ICD-10 Impact

    Diagnostic & Documentation Impact

    Enhanced Specificity

    ICD-10 Improvements

    Accurate coding impacts epidemiological tracking and resource allocation for infectious disease control.

    ICD-9 vs ICD-10

    Accurate coding impacts epidemiological tracking and resource allocation for infectious disease control.

    Reimbursement & Billing Impact

    Accurate coding impacts epidemiological tracking and resource allocation for infectious disease control.

    Resources

    Clinical References

    • •
      CDC Typhoid Fever Information

    Coding & Billing References

    • •
      CDC Typhoid Fever Information

    Frequently Asked Questions

    What are the common symptoms of typhoid fever?

    Common symptoms include prolonged fever, weakness, abdominal pain, headache, and gastrointestinal disturbances.

    How is typhoid fever diagnosed?

    Diagnosis is typically made through blood cultures and clinical evaluation, including travel history.