---
title: "ICD-10-CM Z00.121: Encounter for routine child health… | BillingBrief"
description: "ICD-10-CM code Z00.121: Encounter for routine child health examination with abnormal findings. Category, related codes, and the official source, in plain…"
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# Z00.121 Encounter for routine child health examination with abnormal findings

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Encounter for routine child health examination with abnormal findings

## Related codes

-   [`Z00.00` Encounter for general adult medical examination without abnormal findings ICD-10-CM](https://billingbrief.com/icd10/z00.00/)
-   [`Z00.01` Encounter for general adult medical examination with abnormal findings ICD-10-CM](https://billingbrief.com/icd10/z00.01/)
-   [`Z00.110` Health examination for newborn under 8 days old ICD-10-CM](https://billingbrief.com/icd10/z00.110/)
-   [`Z00.111` Health examination for newborn 8 to 28 days old ICD-10-CM](https://billingbrief.com/icd10/z00.111/)
-   [`Z00.129` Encounter for routine child health examination without abnormal findings ICD-10-CM](https://billingbrief.com/icd10/z00.129/)
-   [`Z00.2` Encounter for examination for period of rapid growth in childhood ICD-10-CM](https://billingbrief.com/icd10/z00.2/)
-   [`Z00.3` Encounter for examination for adolescent development state ICD-10-CM](https://billingbrief.com/icd10/z00.3/)
-   [`Z00.5` Encounter for examination of potential donor of organ and tissue ICD-10-CM](https://billingbrief.com/icd10/z00.5/)

## Common questions

### Is Z00.121 a billable code?

Yes. Z00.121 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

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

Chapter

Factors influencing health status and contact with health services

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).