ICD-10-CM 2027
ICD-10 code for Well-child visit
Encounter for routine child health examination without abnormal findings
Confirmed by the official ICD-10-CM index entry “admission (for) › examination at health care facility (adult) › hearing › infant or child (over 28 days old)”. Page updated September 29, 2026.
About coding Well-child visit
The ICD-10-CM code for Well-child visit is Z00.129 (Encounter for routine child health examination without abnormal findings). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Z00.129.
It is also searched as child examination.
Within Z00.12, choose Z00.129 (without abnormal findings) only when documentation doesn't support a more specific option: with abnormal findings (Z00.121).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 795 (Normal Newborn, relative weight 0.2022) and DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period) and MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Related Well-child visit codes
Common questions about Well-child visit ICD-10 codes
What is the ICD-10 code for Well-child visit?
- Z00.129 — Encounter for routine child health examination without abnormal findings. More specific codes apply when the documentation supports them: Z00.110, Z00.111, Z00.121.
What is the ICD-10 code for health examination for newborn under 8 days old?
- Z00.110 — Health examination for newborn under 8 days old.
What is the ICD-10 code for health examination for newborn 8 to 28 days old?
- Z00.111 — Health examination for newborn 8 to 28 days old.
What is the ICD-10 code for encounter for routine child health examination with abnormal findings?
- Z00.121 — Encounter for routine child health examination with abnormal findings.
Is Z00.129 billable?
- Yes. Z00.129 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z00.129 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z00.129 a CC or MCC?
- No. Z00.129 is neither a CC nor an MCC under MS-DRG v44.0.