ICD-10: A03.1

ICD-10 code A03.1 specifically refers to Shigellosis caused by the bacterium Shigella flexneri. Here are the clinical descriptions and details associated with this diagnosis:

• Classification: A03.1 is categorized under the range of intestinal infectious diseases as per the World Health Organization (WHO) classification system [1][2].

• Clinical Symptoms: The clinical illness associated with Shigellosis typically presents with several symptoms, including:

• Diarrhea, which can be watery and often bloody
• Fever
• Nausea
• Vomiting
• Abdominal pain

• Cramps and tenesmus (a feeling of incomplete defecation) [4][8].

• Infectious Nature: Shigellosis is characterized by infectious diarrhea and subsequent colitis, primarily caused by bacteria from the Shigella genus. Shigella species, including Shigella flexneri, are known to be virulent and invasive, leading to significant gastrointestinal distress [7].

• Asymptomatic Cases: It is important to note that asymptomatic infections can occur, meaning some individuals may carry the bacteria without exhibiting any symptoms [8].

• Billing and Usage: The A03.1 code is a billable diagnosis code, which means it can be used for medical billing and reimbursement purposes. It is valid for use in HIPAA-covered transactions from October 1, 2024, through September 30, 2025 [10][12].

• Clinical Management: Management of Shigellosis typically involves supportive care, including hydration and, in some cases, antibiotics, depending on the severity of the infection and the specific strain of Shigella involved.

This information provides a comprehensive overview of the clinical aspects and details related to ICD-10 code A03.1 for Shigellosis due to Shigella flexneri.