Is A23 a billable ICD-10-CM code?

No. A23 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does A23 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Certain zoonotic bacterial diseases (A20-A28).

A23

A23 — Brucellosis

Non-billable headerICD-10-CM

A23 is a non-billable header ICD-10-CM code for brucellosis. It cannot be billed on its own: choose one of the more specific child codes below.

Includes

Conditions this code covers.

Malta fever
Mediterranean fever
undulant fever

Risk adjustment

A23 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead A23

6 child codes. Green means billable.

A23.0Brucellosis due to Brucella melitensis
A23.1Brucellosis due to Brucella abortus
A23.2Brucellosis due to Brucella suis
A23.3Brucellosis due to Brucella canis
A23.8Other brucellosis
A23.9Brucellosis, unspecified

Questions about A23

Is A23 a billable ICD-10-CM code?: No. A23 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does A23 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Certain zoonotic bacterial diseases (A20-A28).