Z00.121 — Encounter for routine child health examination with abnormal findings
Is Z00.121 billable?
Yes — Z00.121 is billable for FY2027. Z00.121 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Z00.121 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Z00.121 at a glance
| Code | Z00.121 |
|---|---|
| Description | Encounter for routine child health examination with abnormal findings |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to Z00.121?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name Z00.121 directly.
CMS will reject this code as the principal diagnosis on an inpatient claim. It describes something other than the condition chiefly responsible for the admission.
Which MS-DRGs does Z00.121 group to?
Z00.121 sits in MDC 15 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 795Normal Newbornmedical
How is Z00.121 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Z00.121. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Examination › child › with abnormal findings (for) (following) (general) (of) (routine)
- Hearing examination › infant or child › with abnormal findings
- Screening › infant or child › with abnormal findings (for)
- Admission › vision examination › infant or child › with abnormal findings (for)
- Examination › hearing › infant or child › with abnormal findings (for) (following) (general) (of) (routine)
- Examination › vision › infant or child › with abnormal findings (for) (following) (general) (of) (routine)
- Immunization › appropriate for age › child › with abnormal findings
- Test, tests, testing › hearing › infant or child › with abnormal findings (for)
- Test, tests, testing › vision › infant or child › with abnormal findings (for)
- Admission › examination at health care facility › hearing › infant or child › with abnormal findings (for)
- Admission › examination at health care facility › vision › infant or child › with abnormal findings (for)
Use additional code
Report an additional code alongside Z00.121 to fully describe the condition. Z00.121 is sequenced first.
- code to identify abnormal findings
Excludes1 — never code together — inherited from Z00
The conditions below can never be reported together with Z00.121 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- encounter for examination for administrative purposes (Z02.-)
Excludes1 — never code together — inherited from Z00.12
The conditions below can never be reported together with Z00.121 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Z00-Z13
The conditions below are not part of Z00.121, but a patient may have both at the same time. When documentation supports it, Z00.121 and the excluded code may both be reported.
Excludes2 — not included here — inherited from Z00
The conditions below are not part of Z00.121, but a patient may have both at the same time. When documentation supports it, Z00.121 and the excluded code may both be reported.
How long has Z00.121 existed?
Z00.121 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.