ICD-10 Code A04.0 – Enteropathogenic Escherichia coli infection (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A04.0 – Enteropathogenic Escherichia coli infection
What it is
A04.0 identifies an intestinal infection caused by enteropathogenic Escherichia coli. Use it when documentation names this specific E. coli type as the cause of the patient’s diarrheal illness.
Clinical signs
Typical findings include acute diarrhea and other gastroenteritis symptoms, such as abdominal cramps or vomiting. Clinical features vary; refer to documentation for the organism and presentation.
When to use this code
Use A04.0 when the provider documents enteropathogenic E. coli infection, enteropathogenic E. coli enteritis, or a similar confirmed diagnosis. It fits cases where the causative organism is specified in the record. If the chart only says “E. coli infection,” check documentation before coding.
Do not use for
Do not use this code for unspecified infectious diarrhea or for other E. coli types, such as shiga toxin-producing or enterotoxigenic strains. Check documentation if the organism is not clearly identified.
Coding tip
Code the organism exactly as documented; if the record does not specify enteropathogenic E. coli, do not assume A04.0.