A02.0 ICD-10-CM Code: Salmonella enteritis
HCC Buddy Code Card
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Intestinal infectious diseases (A00-A09)
A02.0
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceSalmonella enteritis
Salmonella enteritis is a bacterial infection of the small intestine caused by Salmonella bacteria, typically resulting in diarrhea, abdominal cramps, and fever. This condition is usually acquired through contaminated food or water.
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
Official- Salmonellosis
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A02.0 in this effective period.
Related Child Codes
Includes
Official- infection or foodborne intoxication due to any Salmonella species other than S. typhi and S. paratyphi
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for A02.0 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A02.0 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A02.0 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A02.0 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 A02.0 an HCC code?
No. A02.0 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A02.0 is the ICD-10-CM diagnosis code for salmonella enteritis. Salmonella enteritis is a bacterial infection of the small intestine caused by Salmonella bacteria, typically resulting in diarrhea, abdominal cramps, and fever. This condition is usually acquired through contaminated food or water. A02.0 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering intestinal infectious diseases (a00-a09).
A02.0 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.
Verify the documentation specifies Salmonella enteritis rather than other forms of salmonellosis (such as typhoid fever or septicemia), as each has a different ICD-10-CM code.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A02.0 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify the documentation specifies Salmonella enteritis rather than other forms of salmonellosis (such as typhoid fever or septicemia), as each has a different ICD-10-CM code
- •Document the source of infection if known (food, water, animal contact) as this may support medical necessity and help with public health reporting