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v1.0.0
ICD-10 Guide
ICD-10 CodesA03.9

A03.9

Shigellosis, unspecified

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

Code Description

ICD-10 A03.9 is a billable code used to indicate a diagnosis of shigellosis, unspecified.

Key Diagnostic Point:

Shigellosis is an infectious disease caused by a group of bacteria known as Shigella. It primarily affects the intestines, leading to diarrhea, fever, and abdominal cramps. The unspecified code is used when the specific type of Shigella is not identified.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of symptoms
  • Potential for severe dehydration

Audit Risk Factors

    Specialty Focus

    Medical Specialties

    Infectious Disease

    Documentation Requirements

    Detailed patient history and symptom description, including onset and duration.

    Common Clinical Scenarios

    Patients presenting with diarrhea, fever, and abdominal pain after exposure to contaminated food or water.

    Billing Considerations

    Consider travel history and potential outbreaks in the community.

    Coding Guidelines

    Inclusion Criteria

    Use A03.9 When
    • Use A03
    • 9 when the specific type of Shigella is not documented
    • Ensure that the clinical documentation supports the diagnosis of shigellosis

    Exclusion Criteria

    Do NOT use A03.9 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 in patients with suspected shigellosis.

    Documentation Requirements

    Document the clinical rationale for testing and any relevant symptoms.

    Specialty Considerations

    Infectious disease specialists may require additional lab tests to rule out other pathogens.

    ICD-10 Impact

    Diagnostic & Documentation Impact

    Enhanced Specificity

    ICD-10 Improvements

    The introduction of ICD-10 allows for more specific coding of infectious diseases, improving data accuracy and treatment tracking.

    ICD-9 vs ICD-10

    The introduction of ICD-10 allows for more specific coding of infectious diseases, improving data accuracy and treatment tracking.

    Reimbursement & Billing Impact

    The introduction of ICD-10 allows for more specific coding of infectious diseases, improving data accuracy and treatment tracking.

    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 nausea.

    How is shigellosis transmitted?

    Shigellosis is primarily transmitted through contaminated food or water, and through direct person-to-person contact.