ICD-10 Code A04.4 – Other intestinal Escherichia coli infections (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A04.4 – Other intestinal Escherichia coli infections
What it is
This code identifies intestinal infection caused by Escherichia coli strains not classified elsewhere. Use it when the record documents a specific E. coli enteric infection, but not a more precise subtype.
Clinical signs
Typical findings include diarrhea, abdominal cramps, nausea, or vomiting. Clinical features vary; refer to documentation, especially when the note confirms intestinal E. coli involvement.
When to use this code
Use A04.4 when the provider documents an intestinal infection due to E. coli and no more specific code applies. It is appropriate for confirmed or clearly documented E. coli enteritis or gastroenteritis. Check documentation if the organism is listed without a clear intestinal diagnosis.
Do not use for
Do not use this code for nonintestinal E. coli infections, such as urinary tract or bloodstream infection. Also avoid it when the chart specifies another gastrointestinal infection code or a different E. coli subtype.
Coding tip
Code the documented organism and site exactly; if the note only says “E. coli infection,” verify that it is intestinal before assigning A04.4.