A04
⚠ Non-billable
Other bacterial intestinal infections
ICD-10-CM · FY2026 · Certain Infectious and Parasitic Diseases
Code
A04
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Certain Infectious and Parasitic Diseases
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code A04?
ICD-10-CM code A04 represents Other bacterial intestinal infections. It is a non-billable header code requiring a more specific subcategory in the Certain Infectious and Parasitic Diseases chapter, effective October 1, 2025 – September 30, 2026.
Is A04 billable?
No. A04 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is A04 in?
A04 belongs to the Certain Infectious and Parasitic Diseases chapter (A00–B99) of ICD-10-CM.
Related codes in the A04 category
A04.0
Enteropathogenic Escherichia coli infection
Billable
A04.1
Enterotoxigenic Escherichia coli infection
Billable
A04.2
Enteroinvasive Escherichia coli infection
Billable
A04.3
Enterohemorrhagic Escherichia coli infection
Billable
A04.4
Other intestinal Escherichia coli infections
Billable
A04.5
Campylobacter enteritis
Billable
A04.6
Enteritis due to Yersinia enterocolitica
Billable
A04.7
Enterocolitis due to Clostridium difficile
Non-billable
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