B96.21
Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 5 never code together
A00-B99chapter
Excludes1
- certain localized infections - see body system-related chapters
Excludes2
- carrier or suspected carrier of infectious disease (Z22.-)Z22.-
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)O98.-
- infectious and parasitic diseases specific to the perinatal period (P35-P39)P35-P39
- influenza and other acute respiratory infections (J00-J22)J00-J22
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 8
B96.21code
Inclusion terms
- E. coli O157:H- (nonmotile) with confirmation of Shiga toxinO15
- E. coli O157 with confirmation of Shiga toxin when H antigen is unknown, or is not H7O15
- O157:H7 Escherichia coli [E. coli] with or without confirmation of Shiga toxin-productionO15
- Shiga toxin-producing Escherichia coli [E. coli] O157:H7 with or without confirmation of Shiga toxin-productionO15
- STEC O157:H7 with or without confirmation of Shiga toxin-productionO15
B95-B97block
Notes
- These categories are provided for use as supplementary or additional codes to identify the infectious agent(s) in diseases classified elsewhere.
Index entries leading here 1
- Escherichia coli (E. coli) , as cause of disease classified elsewhere B96.20
Alongside this code 4 same parent — B96.2
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.