Is A31 a billable ICD-10-CM code?

No. A31 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does A31 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Other bacterial diseases (A30-A49).

A31

A31 — Infection due to other mycobacteria

Non-billable headerICD-10-CM

A31 is a non-billable header ICD-10-CM code for infection due to other mycobacteria. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

leprosy (A30.-)
tuberculosis (A15-A19)

Risk adjustment

A31 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 A31

5 child codes. Green means billable.

Questions about A31

Is A31 a billable ICD-10-CM code?: No. A31 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does A31 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Other bacterial diseases (A30-A49).