ICD‑10 Code A043 – Enterohemorrhagic Escherichia coli infection Enterohemorrhagic Escherichia coli infection
Clinical context, related codes, and quick guidance
Billable
Active (Valid as of April 2025) · ICD-10-CM (US)
Code Details
| Code | A043 |
|---|---|
| Category | A04 – Other bacterial intestinal infections Other bacterial intestinal infections |
| Version | ICD-10-CM (US) |
| Status | Active (Valid as of April 2025) |
Plain‑English Summary
ICD-10-CM code A04.3 identifies enterohemorrhagic Escherichia coli (EHEC) infection, a specific bacterial intestinal infection known for causing severe, often bloody, diarrhea. This billable code is crucial for accurate medical documentation and reimbursement.
When to Use This Code
- Signs/symptoms consistent with the code description
- No more specific diagnosis or etiology documented
- Used during initial or follow‑up encounters per payer rules
Related Codes
Browse category »| Code | Description |
|---|---|
| A040 | Enteropathogenic Escherichia coli infection Enteropathogenic Escherichia coli infection |
| A041 | Enterotoxigenic Escherichia coli infection Enterotoxigenic Escherichia coli infection |
| A042 | Enteroinvasive Escherichia coli infection Enteroinvasive Escherichia coli infection |
| A044 | Other intestinal Escherichia coli infections Other intestinal Escherichia coli infections |
| A045 | Campylobacter enteritis Campylobacter enteritis |
| A046 | Enteritis due to Yersinia enterocolitica Enteritis due to Yersinia enterocolitica |
FAQ
ICD-10-CM A04.3 represents an Enterohemorrhagic Escherichia coli infection, which is a bacterial infection of the intestines. This type of E. coli is known to produce toxins that can cause severe, often bloody, diarrhea and abdominal cramps.
Yes, A04.3 is a billable and specific ICD-10-CM code. It is used by healthcare providers to indicate a diagnosis for reimbursement purposes and was updated for the 2026 effective year starting October 1, 2025.
Common symptoms of enterohemorrhagic E. coli infection typically include severe abdominal cramps, watery diarrhea that often becomes bloody, and sometimes nausea and vomiting. In some severe cases, it can lead to hemolytic uremic syndrome (HUS), a serious complication affecting the kidneys.
Want to Master ICD‑10 Coding?
Tags :
ICD-10 A04.3
Enterohemorrhagic E. coli infection
EHEC infection ICD-10
Escherichia coli hemorrhagic enteritis
Verotoxigenic E. coli
Bloody diarrhea E. coli
Bacterial intestinal infection ICD-10
ICD10 code for enterohemorrhagic E. coli
ICD10 code for EHEC
ICD10 code for hemorrhagic E. coli enteritis