All ICD10 Codes

A23

Non-Billable
ChapterA00–B99
Rankcategory
Official Description

Brucellosis

Use a more specific code (6 billable)
A23.0Brucellosis due to Brucella melitensisA23.1Brucellosis due to Brucella abortusA23.2Brucellosis due to Brucella suisA23.3Brucellosis due to Brucella canisA23.8Other brucellosisA23.9Brucellosis, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

CH1 Parent Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here. Use a different code.)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here. Code separately if applicable.)
  • carrier or suspected carrier of infectious disease (Z22.-)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)
Use Additional Code
  • code to identify resistance to antimicrobial drugs (Z16.-)

Instructional Notes

Includes
  • Malta fever
  • Mediterranean fever
  • undulant fever

Clinical Hierarchy

BillableHas subcodes
CH1Certain infectious and parasitic diseases (A00-B99)
A20-A28Certain zoonotic bacterial diseases (A20-A28)
A23BrucellosisNot billable
A23.0Brucellosis due to Brucella melitensisBillable
A23.1Brucellosis due to Brucella abortusBillable
A23.2Brucellosis due to Brucella suisBillable
A23.3Brucellosis due to Brucella canisBillable
A23.8Other brucellosisBillable
A23.9Brucellosis, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to A23:

chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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