Billable / Specific Code
ICD-10-CM B96.21 is the diagnosis code for Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere. This code falls under the section "Bacterial and viral infectious agents" within Chapter 1 — Certain infectious and parasitic diseases (A00-B99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where B96.21 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, B96.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
B96.21 is the ICD-10-CM diagnosis code for "Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of B96.21 is B96.2 ("Escherichia coli [E. coli ] as the cause of diseases classified elsewhere"). B96.21 provides a more specific classification within this category.
B96.21 is located in Section B95-B97 — "Bacterial and viral infectious agents" within Chapter 1 of the ICD-10-CM Tabular List.
Use B96.21 when the patients documented diagnosis matches "Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere is B96.21.
Yes, B96.21 can be used as a primary diagnosis code since it is billable and specific.
B96.21 is in Chapter 1 of the ICD-10-CM Tabular List.
Yes, B96.21 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.