A04.1 Enterotoxigenic Escherichia coli infection

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from A04 Other bacterial intestinal infections

Excludes1 (never code together)

• bacterial foodborne intoxications, NEC (A05.-)
• tuberculous enteritis (A18.32)

MS-DRG index

Defines the logic of DRG(s) 371-373 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 008.02 Intestinal infection due to enterotoxigenic E. coli

Code annotations containing back-references to A04.1

Back-references to A04.1

• Type 1 Excludes: A05 Other bacterial foodborne intoxications, not elsewhere classified ("Escherichia coli infection (A04.0-A04.4)")

Back-references to A04

• Code First: M49 Spondylopathies in diseases classified elsewhere ("enterobacterial infections (A01-A04)")
• Type 2 Excludes: P37 Other congenital infectious and parasitic diseases ("infectious neonatal diarrhea (A00-A09)")

Diagnosis Index entries for A04.1

• Diarrhea, diarrheal (disease) (infantile) (inflammatory) › due to › Escherichia coli › enterotoxigenic
• Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) › infectious NOS › due to › Escherichia coli › enterotoxigenic

Nearby codes

• A04 Other bacterial intestinal infections
• A04.0 Enteropathogenic Escherichia coli infection
• A04.1 Enterotoxigenic Escherichia coli infection (this code)
• A04.2 Enteroinvasive Escherichia coli infection
• A04.3 Enterohemorrhagic Escherichia coli infection
• A04.4 Other intestinal Escherichia coli infections
• A04.5 Campylobacter enteritis
• A04.6 Enteritis due to Yersinia enterocolitica