Is A53 a billable ICD-10-CM code?

No. A53 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does A53 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).

A53

A53 — Other and unspecified syphilis

Non-billable headerICD-10-CM

A53 is a non-billable header ICD-10-CM code for other and unspecified syphilis. It cannot be billed on its own: choose one of the more specific child codes below.

Risk adjustment

A53 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 A53

2 child codes. Green means billable.

A53.0Latent syphilis, unspecified as early or late
A53.9Syphilis, unspecified

Questions about A53

Is A53 a billable ICD-10-CM code?: No. A53 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does A53 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).