A04.8 ICD-10-CM Code: Other specified bacterial intestinal infections
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Intestinal infectious diseases (A00-A09)
A04.8
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOther specified bacterial intestinal infections
This code describes bacterial infections of the intestines that don't fit into other specific categories, such as infections caused by less common bacteria. These infections typically cause digestive symptoms like diarrhea, abdominal pain, and nausea.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for A04.8 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A04.8 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for A04.8 in this effective period.
Excludes 1
Official- bacterial foodborne intoxications, NEC (A05.-)
- tuberculous enteritis (A18.32)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A04.8 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A04.8 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A04.8 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is A04.8 an HCC code?
No. A04.8 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A04.8 is the ICD-10-CM diagnosis code for other specified bacterial intestinal infections. This code describes bacterial infections of the intestines that don't fit into other specific categories, such as infections caused by less common bacteria. These infections typically cause digestive symptoms like diarrhea, abdominal pain, and nausea. A04.8 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering intestinal infectious diseases (a00-a09).
A04.8 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Use this code only when the specific bacterial organism is identified but doesn't have its own dedicated ICD-10-CM code; always try to use more specific codes first (A04.0-A04.7) if the organism is Campylobacter, Shigella, Salmonella, or other common pathogens.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A04.8 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code only when the specific bacterial organism is identified but doesn't have its own dedicated ICD-10-CM code; always try to use more specific codes first (A04.0-A04.7) if the organism is Campylobacter, Shigella, Salmonella, or other common pathogens
- •Document the specific causative organism in the medical record to support medical necessity and ensure accurate coding; this code requires that a bacterial cause is confirmed, not just suspected