Is Z00.0 a billable ICD-10-CM code?

No. Z00.0 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does Z00.0 sit in the tabular list?

Factors influencing health status and contact with health services (Z00-Z99), in the block Persons encountering health services for examinations (Z00-Z13).

What cannot be coded together with Z00.0?

Z00.0 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Z00.0 (Z00) and apply to it just the same.

Z00.0

Z00.0 — Encounter for general adult medical examination

Non-billable headerICD-10-CM

Z00.0 is a non-billable header ICD-10-CM code for encounter for general adult medical examination. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

encounter for examination of sign or symptom- code to sign or symptom
general health check-up of infant or child (Z00.12.-)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Encounter for adult periodic examination (annual) (physical) and any associated laboratory and radiologic examinations

Excludes1 inherited from the categories above Z00.0

These are not written on Z00.0, but they bind it: a note on a category applies to every code beneath it. Billing Z00.0 with anything listed here is a denial.

Written on Z00 — Encounter for general examination without complaint, suspected or reported diagnosis

encounter for examination for administrative purposes (Z02.-)

Excludes2 inherited from the categories above Z00.0

Also inherited, and the opposite of Excludes1: these conditions are not part of Z00.0, but a patient can have both, so you may code both.

Written on Z00 — Encounter for general examination without complaint, suspected or reported diagnosis

encounter for pre-procedural examinations (Z01.81-)
special screening examinations (Z11-Z13)

Risk adjustment

Z00.0 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 history

Z00.0 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead Z00.0

2 child codes. Green means billable.

Related codes at this level

Codes that share Z00. If Z00.0 is not quite right, the correct code is usually one of these.

Questions about Z00.0

Is Z00.0 a billable ICD-10-CM code?: No. Z00.0 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Z00.0 sit in the tabular list?: Factors influencing health status and contact with health services (Z00-Z99), in the block Persons encountering health services for examinations (Z00-Z13).
What cannot be coded together with Z00.0?: Z00.0 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Z00.0 (Z00) and apply to it just the same.