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A04

A04: Other bacterial intestinal infections

Non-billable headerICD-10-CM

A04 is a non-billable header ICD-10-CM code for other bacterial intestinal infections. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • bacterial foodborne intoxications, NEC (A05.-)
  • tuberculous enteritis (A18.32)

Other codes that can never be billed with A04

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • A05Other bacterial foodborne intoxications, not elsewhere classified
  • K59.3Megacolon, not elsewhere classified
  • A28.2Extraintestinal yersiniosis
  • Z86.17Personal history of Clostridioides difficile infection

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead A04

10 child codes. Green means billable.

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.