Is Z78 a billable ICD-10-CM code?

No. Z78 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does Z78 sit in the tabular list?

Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).

Z78

Z78 — Other specified health status

Non-billable headerICD-10-CM

Z78 is a non-billable header ICD-10-CM code for other specified health status. 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.

asymptomatic human immunodeficiency virus [HIV] infection status (Z21)
postprocedural status (Z93-Z99)
sex reassignment status (Z87.890)

Other codes that can never be billed with Z78

These codes carry an Excludes1 note pointing at Z78. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Z78 alone.

N95.1Menopausal and female climacteric states

Risk adjustment

Z78 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 Z78

3 child codes. Green means billable.

Questions about Z78

Is Z78 a billable ICD-10-CM code?: No. Z78 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Z78 sit in the tabular list?: Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).