B96.21
Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere
Clinical Classification Guidelines
Inclusion Terms
- E. coli O157:H- (nonmotile) with confirmation of Shiga toxin
- E. coli O157 with confirmation of Shiga toxin when H antigen is unknown, or is not H7
- O157:H7 Escherichia coli [E. coli] with or without confirmation of Shiga toxin-production
- Shiga toxin-producing Escherichia coli [E. coli] O157:H7 with or without confirmation of Shiga toxin-production
- STEC O157:H7 with or without confirmation of Shiga toxin-production
Medical Intelligence & Overview
ICD-10 code B96.21 refers to infections caused by specific strains of Escherichia coli (E. coli), particularly the O157 serotype that produces Shiga toxin. These bacteria can cause serious gastrointestinal illnesses and other complications. Recognizing the distinct features of this infection helps in understanding its severity and the importance of proper diagnosis and management.
Causes & Symptoms
Clinical Causes: Contaminated food, especially undercooked ground beef, unpasteurized milk, and contaminated vegetables Ingestion of contaminated water or contact with infected animals Person-to-person transmission through poor hygiene practices Inadequate sanitation practices in food handling
Key Symptoms: Severe abdominal cramps Watery or bloody diarrhea Nausea and vomiting Fever (sometimes mild or absent) In some cases, development of Hemolytic Uremic Syndrome (HUS), leading to kidney failure
Diagnostic & Treatment
Diagnosis Path: Diagnosis typically involves stool tests to detect the presence of E. coli O157:H7 and to identify the production of Shiga toxin. Laboratory analysis confirming the bacteria's serotype and toxin production helps determine the appropriate course of action. Additional tests may include blood tests and kidney function assessments if complications are suspected.
Treatment Protocols: Management focuses on supportive care, such as staying well-hydrated and resting. Antibiotics are generally not recommended as they may increase the risk of complications. Severe cases, especially those progressing to HUS, require hospitalization, kidney support, and close medical supervision. Preventive strategies include proper food handling, cooking meat thoroughly, avoiding unpasteurized products, and practicing good personal hygiene.
Clinical Advice & FAQs
Billing Guidance
Is B96.21 a billable ICD-10 code?
Yes, B96.21 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report B96.21?
Clinical documentation must specify the nature of Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere and any associated comorbidities for accurate reporting.
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