2026 ICD-10-CM Diagnosis Code Z13.42Encounter for screening for global developmental delays (milestones)

ICD-10-CM Codes›Z00–Z99›Z00-Z13›Z13

ICD-10-CM Z13.42
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z13.42 is a billable ICD-10-CM diagnosis code for encounter for screening for global developmental delays (milestones). It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Screening for neurocognitive or neurodevelopmental condition.

Code Identity

ICD-10-CM Code
Z13.42
Billable Status
Yes — Valid for Submission
Code Describes
Encounter for screening for global developmental delays (milestones)
Short Description
Encntr screen for global developmental delays (milestones)
Parent Code
Z13.4
Encounter for screening for certain developmental disorders in childhood

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ00-Z13Persons encountering health services for examinations
CategoryZ13Encounter for screening for other diseases and disorders
This CodeZ13.42Encounter for screening for global developmental delays (milestones)

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z13.42.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

Z13.42 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Encounter for screening for developmental handicaps in early childhood

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Screening(for)
      • developmental
        • delays
          • global (milestones)
    • Screening(for)
      • developmental
        • handicap
    • Screening(for)
      • developmental
        • handicap
          • in early childhood
    • Screening(for)
      • disease or disorder
        • developmental delays
          • global (milestones)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR FAC018
Screening for neurocognitive or neurodevelopmental condition
Default principal diagnosis: inpatient No · outpatient Yes

Patient EducationClinical

Health Screening

Screenings are tests that look for diseases before you have symptoms. Screening tests can find diseases early, when they're easier to treat. You can get some screenings in your doctor's office. Others need special equipment, so you may need to go to a different office or clinic.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code History & ChangesHistory

Replacement Z13.42 replaces the following previously assigned code(s):

  • Z13.4 - Encntr screen for certain developmental disorders in chldhd
FY 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z13.42Overview

Is Z13.42 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report encounter for screening for global developmental delays (milestones) on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z13.42 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because encounter for screening for global developmental delays (milestones) describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z13.42 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for encounter for screening for global developmental delays (milestones) on inpatient claims.