ICD-10 Code for Escherichia Coli, As Cause of Disease Classified Elsewhere
Also indexed as (E. coli)
The ICD-10-CM code for escherichia Coli, As Cause of Disease Classified Elsewhere is B96.20 — Unspecified Escherichia coli [E. coli] as the cause of diseases classified elsewhere. This is the code the Alphabetic Index gives for escherichia Coli, As Cause of Disease Classified Elsewhere with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
B96.20 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which escherichia Coli, As Cause of Disease Classified Elsewhere code should you use?
The Alphabetic Index lists 5 codes under Escherichia coli, as cause of disease classified elsewhere. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| non-O157 Shiga toxin-producing | B96.22 | Other specified Shiga toxin-producing Escherichia coli [E. coli] [STEC] as the cause of diseases classified elsewhere |
| non-Shiga toxin-producing | B96.29 | Other Escherichia coli [E. coli] as the cause of diseases classified elsewhere |
| O157 | B96.21 | Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere |
| O157 with confirmation of Shiga toxin when H antigen is unknown, or is not H7 | B96.21 | Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere |
| O157:H-with confirmation of Shiga toxin | B96.21 | Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere |
| O157:H7 with or without confirmation of Shiga toxin-production | B96.21 | Shiga toxin-producing Escherichia coli [E. coli] [STEC] O157 as the cause of diseases classified elsewhere |
| Shiga toxin-producing | B96.23 | Unspecified Shiga toxin-producing Escherichia coli [E. coli] [STEC] as the cause of diseases classified elsewhere |
| specified NEC | B96.29 | Other Escherichia coli [E. coli] as the cause of diseases classified elsewhere |
Escherichia Coli, As Cause of Disease Classified Elsewhere O157:H7 with or without confirmation of Shiga toxin-production
| specified NEC | B96.22 | Other specified Shiga toxin-producing Escherichia coli [E. coli] [STEC] as the cause of diseases classified elsewhere |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources