A04: Other bacterial intestinal infections
Codes under A04 (Other bacterial intestinal infections). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| A04.0 | Enteropathogenic Escherichia coli infection | ✓ |
| A04.0 | Enteropathogenic Escherichia coli infection | ✓ |
| A04.1 | Enterotoxigenic Escherichia coli infection | ✓ |
| A04.1 | Enterotoxigenic Escherichia coli infection | ✓ |
| A04.2 | Enteroinvasive Escherichia coli infection | ✓ |
| A04.2 | Enteroinvasive Escherichia coli infection | ✓ |
| A04.3 | Enterohemorrhagic Escherichia coli infection | ✓ |
| A04.3 | Enterohemorrhagic Escherichia coli infection | ✓ |
| A04.4 | Other intestinal Escherichia coli infections | ✓ |
| A04.4 | Other intestinal Escherichia coli infections | ✓ |
| A04.5 | Campylobacter enteritis | ✓ |
| A04.5 | Campylobacter enteritis | ✓ |
| A04.6 | Enteritis due to Yersinia enterocolitica | ✓ |
| A04.6 | Enteritis due to Yersinia enterocolitica | ✓ |
| A04.7 | Enterocolitis due to Clostridium difficile | — |
| A04.7 | Enterocolitis due to Clostridium difficile | — |
| A04.8 | Other specified bacterial intestinal infections | ✓ |
| A04.8 | Other specified bacterial intestinal infections | ✓ |
| A04.9 | Bacterial intestinal infection, unspecified | ✓ |
| A04.9 | Bacterial intestinal infection, unspecified | ✓ |
| A04.71 | Enterocolitis due to Clostridium difficile, recurrent | ✓ |
| A04.71 | Enterocolitis due to Clostridium difficile, recurrent | ✓ |
| A04.72 | Enterocolitis due to Clostridium difficile, not specified as recurrent | ✓ |
| A04.72 | Enterocolitis due to Clostridium difficile, not specified as recurrent | ✓ |
Frequently asked questions
What is ICD-10-CM code A04?
A04 is an ICD-10-CM category covering Other bacterial intestinal infections. It contains 24 more specific diagnosis codes, 22 of which are billable.
Is A04 a billable code?
No — A04 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example A04.0 — Enteropathogenic Escherichia coli infection). 22 of the 24 codes under A04 are billable.
What codes fall under A04?
A04 includes A04.0, A04.0, A04.1, A04.1, A04.2, plus 19 more. See the full list with descriptions and billable status above.
More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees
Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
Code the diagnosis right
Join providers across the country delivering modern virtual care with CareNiva. Free to start, ready in minutes.
100% Satisfaction Guaranteed — try it risk-free