A04.4 Other intestinal Escherichia coli infections
The ICD-10-CM code for Other intestinal Escherichia coli infections is A04.4 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- A00-A09: Intestinal infectious diseases (A00-A09)
- Category A04
- 13 codes (11 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to A04.4:
- Diarrhea, diarrheal (disease) (infantile) (inflammatory) › due to › Escherichia coli
- Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) › infectious NOS › due to › Escherichia coli
- Diarrhea, diarrheal (disease) (infantile) (inflammatory) › due to › Escherichia coli › enteroaggregative
- Diarrhea, diarrheal (disease) (infantile) (inflammatory) › due to › Escherichia coli › specified NEC
- Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) › infectious NOS › due to › Escherichia coli › specified NEC
- Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) › infectious NOS › due to › Escherichia coli › enteroaggregative
Inclusion Terms
- Escherichia coli enteritis NOS
U.S. Hospital Utilization
- An estimated 7,730 U.S. inpatient stays in 2023 included A04.4 among the documented diagnoses.
- 2,585 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
HIV Infections (TOC entry)a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19
Infectious agents causing diseases in other chapters (TOC)b. Infectious agents as the cause of diseases classified to other chapters ................................. 22
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026