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v1.0.0
ICD-10 Guide
ICD-10 CodesA03.1

A03.1

Shigellosis due to Shigella flexneri

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

Code Description

ICD-10 A03.1 is a billable code used to indicate a diagnosis of shigellosis due to shigella flexneri.

Key Diagnostic Point:

An infectious disease caused by the bacterium Shigella flexneri, characterized by diarrhea, fever, and abdominal cramps.

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, symptomatology, and laboratory confirmation of Shigella flexneri.

    Common Clinical Scenarios

    Outbreaks in community settings, travel-related infections, and immunocompromised patients.

    Billing Considerations

    Consideration of antibiotic resistance patterns in treatment.

    Coding Guidelines

    Inclusion Criteria

    Use A03.1 When
    • Use A03
    • 1 when the infection is confirmed to be due to Shigella flexneri; ensure documentation supports the diagnosis

    Exclusion Criteria

    Do NOT use A03.1 When
    No specific exclusions found.

    Related CPT Codes

    87449CPT Code

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

    Clinical Scenario

    Testing stool samples for Shigella flexneri in suspected cases.

    Documentation Requirements

    Document clinical symptoms and rationale for testing.

    Specialty Considerations

    Consider referral to infectious disease specialists for severe cases.

    ICD-10 Impact

    Diagnostic & Documentation Impact

    Enhanced Specificity

    ICD-10 Improvements

    Accurate coding impacts treatment protocols and public health reporting, especially during outbreaks.

    ICD-9 vs ICD-10

    Accurate coding impacts treatment protocols and public health reporting, especially during outbreaks.

    Reimbursement & Billing Impact

    Accurate coding impacts treatment protocols and public health reporting, especially during outbreaks.

    Resources

    Clinical References

    • •
      CDC Shigellosis Information

    Coding & Billing References

    • •
      CDC Shigellosis Information

    Frequently Asked Questions

    What are the common symptoms of Shigellosis?

    Common symptoms include diarrhea (often bloody), fever, abdominal cramps, and tenesmus.

    How is Shigellosis transmitted?

    Shigellosis is transmitted through fecal-oral route, often via contaminated food or water.