ICD-10-CM diagnosis code
Z13.42 Encounter for screening for global developmental delays (milestones)
- Billable
- Yes, a complete code (FY2026)
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Other codes in Z13
30 complete codes in this category.
- Z13.30Encounter for screening examination for mental health and behavioral disorders, unspecified
- Z13.31Encounter for screening for depression
- Z13.32Encounter for screening for maternal depression
- Z13.39Encounter for screening examination for other mental health and behavioral disorders
- Z13.40Encounter for screening for unspecified developmental delays
- Z13.41Encounter for autism screening
- Z13.42Encounter for screening for global developmental delays (milestones)
- Z13.49Encounter for screening for other developmental delays
- Z13.5Encounter for screening for eye and ear disorders
- Z13.6Encounter for screening for cardiovascular disorders
- Z13.71Encounter for nonprocreative screening for genetic disease carrier status
- Z13.79Encounter for other screening for genetic and chromosomal anomalies
Documentation tips
- Make sure the note supports every element of the title, “Encounter for screening for global developmental delays (milestones)”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to Z13.
The international WHO ICD-10 also has Z13, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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