ICD-10 Code B96.22 – Other specified Shiga toxin-producing Escherichia coli [E. coli] [STEC] as the cause of diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B96.22 – Other specified Shiga toxin-producing Escherichia coli [E. coli] [STEC] as the cause of diseases classified elsewhere
What it is
This code identifies a specific Shiga toxin-producing E. coli organism documented as the cause of another condition. Use it only when the provider links this bacterium to a disease classified elsewhere.
Clinical signs
Clinical features vary; refer to documentation. STEC infection may be associated with acute gastrointestinal illness, including diarrhea and abdominal pain, and can sometimes be linked to more serious complications.
When to use this code
Use B96.22 when the record states that other specified STEC is the causative organism for a diagnosed condition, such as an infectious or gastrointestinal disease coded elsewhere. You should sequence the underlying condition first and add this code as the organism cause. If the chart does not clearly identify the organism, check documentation.
Do not use for
Do not use this code for unspecified E. coli, other bacterial causes, or when STEC is not documented as the cause. Do not assign it as a principal diagnosis.
Coding tip
Confirm both the organism and the linked condition in the provider note before assigning B96.22.