U.S. ICD-10-CM · FY 2027

A23 ICD-10-CM Code: Brucellosis

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

A23

Brucellosis

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where A23 sits

  1. 1

    Chapter 1

    Certain infectious and parasitic diseases (A00-B99)

  2. 2

    Section

    Certain zoonotic bacterial diseases (A20-A28)

  3. 3

    Category A23

    Brucellosis

  4. 4

    Code A23

    Brucellosis

More specific choices

Codes under A23

A23 is a non-billable category. Choose the child code that best matches the documented diagnosis.

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for A23.

Code first

No “code first” instruction is listed for A23.

Use additional code

No “use additional code” instruction is listed for A23.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for A23.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for A23.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code A23 mean?

A23 is the FY 2027 U.S. ICD-10-CM code for “Brucellosis.”

Is A23 a billable or specific ICD-10-CM code?

No. A23 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is A23 located in ICD-10-CM?

A23 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Certain zoonotic bacterial diseases (A20-A28) (A20–A28), under category A23, Brucellosis.

What coding notes are listed for A23?

No inclusion terms are listed for A23 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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