Is A20 a billable ICD-10-CM code?

No. A20 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does A20 sit in the tabular list?

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

A20

A20 — Plague

Non-billable headerICD-10-CM

A20 is a non-billable header ICD-10-CM code for plague. It cannot be billed on its own: choose one of the more specific child codes below.

Includes

Conditions this code covers.

infection due to Yersinia pestis

Other codes that can never be billed with A20

These codes carry an Excludes1 note pointing at A20. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A20 alone.

A28.2Extraintestinal yersiniosis

Risk adjustment

A20 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 A20

7 child codes. Green means billable.

Questions about A20

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