Is A22 a billable ICD-10-CM code?

No. A22 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does A22 sit in the tabular list?

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

A22

A22 — Anthrax

Non-billable headerICD-10-CM

A22 is a non-billable header ICD-10-CM code for anthrax. It cannot be billed on its own: choose one of the more specific child codes below.

Includes

Conditions this code covers.

infection due to Bacillus anthracis

Other codes that can never be billed with A22

These codes carry an Excludes1 note pointing at A22. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A22 alone.

J17Pneumonia in diseases classified elsewhere

Risk adjustment

A22 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 A22

6 child codes. Green means billable.

Questions about A22

Is A22 a billable ICD-10-CM code?: No. A22 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does A22 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Certain zoonotic bacterial diseases (A20-A28).