B96.23 — Unspecified Shiga toxin-producing Escherichia coli [E. coli] [STEC] as the cause of diseases classified elsewhere
Is B96.23 billable?
Yes, but B96.23 is an unspecified code. B96.23 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, B96.23 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting B96.23 — the more specific alternatives are listed below.
B96.23 at a glance
| Code | B96.23 |
|---|---|
| Description | Unspecified Shiga toxin-producing Escherichia coli [E. coli] [STEC] as the cause of diseases classified elsewhere |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to B96.23?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name B96.23 directly.
CMS will reject this code as the principal diagnosis on an inpatient claim. It describes something other than the condition chiefly responsible for the admission.
Which MS-DRGs does B96.23 group to?
B96.23 sits in MDC 18 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 867Other Infectious and Parasitic Diseases Diagnoses with MCCmedical
- 868Other Infectious and Parasitic Diseases Diagnoses with CCmedical
- 869Other Infectious and Parasitic Diseases Diagnoses without CC/MCCmedical
How is B96.23 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to B96.23. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Escherichia coli, as cause of disease classified elsewhere › Shiga toxin-producing (E. coli)
Inclusion terms
Alternative wording in documentation that is classified to B96.23.
- Shiga toxin-producing Escherichia coli [E. coli] with unspecified O group
- STEC NOS
Use additional code — inherited from Chapter 1
Report an additional code alongside B96.23 to fully describe the condition. B96.23 is sequenced first.
- code to identify resistance to antimicrobial drugs (Z16.-)
Excludes2 — not included here — inherited from Chapter 1
The conditions below are not part of B96.23, but a patient may have both at the same time. When documentation supports it, B96.23 and the excluded code may both be reported.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
How long has B96.23 existed?
B96.23 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
- FY2021Unspecified Shiga toxin-producing Escherichia coli [E. coli] (STEC) as the cause of diseases classified elsewhereUnspecified Shiga toxin-producing Escherichia coli [E. coli] [STEC] as the cause of diseases classified elsewhere
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which conditions are coded to B96.23?
What other codes are in the B96.2 family? (4)
- B96.20Unspecified Escherichia coli [E. coli] as the cause of diseases classified elsewhere
- B96.21Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere
- B96.22Other specified Shiga toxin-producing Escherichia coli [E. coli] [STEC] as the cause of diseases classified elsewhere
- B96.29Other Escherichia coli [E. coli] as the cause of diseases classified elsewhere