A23.8 ICD-10-CM Code: Other brucellosis
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Certain zoonotic bacterial diseases (A20-A28)
A23.8
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOther brucellosis
This code represents brucellosis infections caused by Brucella species other than the common types (B. melitensis, B. abortus, or B. suis). Brucellosis is a bacterial infection typically transmitted from infected animals or contaminated animal products to humans.
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 A23.8 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A23.8 in this effective period.
Related Child Codes
Includes
Official- Malta fever
- Mediterranean fever
- undulant fever
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for A23.8 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A23.8 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A23.8 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A23.8 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 A23.8 an HCC code?
No. A23.8 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
A23.8 is the ICD-10-CM diagnosis code for other brucellosis. This code represents brucellosis infections caused by Brucella species other than the common types (B. melitensis, B. abortus, or B. suis). Brucellosis is a bacterial infection typically transmitted from infected animals or contaminated animal products to humans. A23.8 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering certain zoonotic bacterial diseases (a20-a28).
A23.8 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 Brucella species is documented as 'other' or unspecified beyond the main three types; if a specific species is identified, use the more specific A23.0-A23.3 codes instead.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A23.8 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 Brucella species is documented as 'other' or unspecified beyond the main three types; if a specific species is identified, use the more specific A23.0-A23.3 codes instead
- •Brucellosis is a reportable disease in most jurisdictions; ensure proper documentation of the source exposure (occupational, food-related, or animal contact) to support medical necessity and public health reporting requirements