Is A63 a billable ICD-10-CM code?

No. A63 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does A63 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Infections with a predominantly sexual mode of transmission (A50-A64).

A63

A63 — Other predominantly sexually transmitted diseases, not elsewhere classified

Non-billable headerICD-10-CM

A63 is a non-billable header ICD-10-CM code for other predominantly sexually transmitted diseases, not elsewhere classified. 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.

molluscum contagiosum (B08.1)
papilloma of cervix (D26.0)

Other codes that can never be billed with A63

These codes carry an Excludes1 note pointing at A63. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A63 alone.

N90Other noninflammatory disorders of vulva and perineum
B33.8Other specified viral diseases
B34Viral infection of unspecified site
R85.81Anal high risk human papillomavirus (HPV) DNA test positive
R87.81High risk human papillomavirus (HPV) DNA test positive from female genital organs

Risk adjustment

A63 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 A63

2 child codes. Green means billable.

Questions about A63

Is A63 a billable ICD-10-CM code?: No. A63 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does A63 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Infections with a predominantly sexual mode of transmission (A50-A64).