2026 ICD-10-CM Diagnosis Code R62.0Delayed milestone in childhood

ICD-10-CM Codes›R00–R99›R50-R69›R62

ICD-10-CM R62.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R62.0 is a billable ICD-10-CM diagnosis code for delayed milestone in childhood. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 640 through 641. The code is restricted by the Medicare Code Editor to pediatric patients (age 0 through 17). As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. Coders also document this condition as delayed milestone. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other general signs and symptoms.

Code Identity

ICD-10-CM Code
R62.0
Billable Status
Yes — Valid for Submission
Code Describes
Delayed milestone in childhood
Short Description
Delayed milestone in childhood
Same as the full description in the CMS dataset.
Parent Code
R62
Lack of expected normal physiological development in childhood and adults

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR50-R69General symptoms and signs
CategoryR62Lack of expected normal physiological development in childhood and adults
This CodeR62.0Delayed milestone in childhood

Code EditsBilling

Medicare Code Editor checks that affect claim validity for R62.0.

Pediatric diagnoses
The Medicare Code Editor detects inconsistencies in pediatric cases by checking a patient's age and any diagnosis on the patient's record. The pediatric code edits apply to patients age range is 0–17 years inclusive (e.g., Reye's syndrome, routine child health exam).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Delayed milestone
  • Delayed toilet training
  • Developmental delay in feeding
  • Not yet sitting
  • Not yet speaking
  • Not yet standing
  • Not yet walking

Tabular List NotesGuidance

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

Inclusion Terms

  • Delayed attainment of expected physiological developmental stage
  • Late talker
  • Late walker

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.

    • Delay, delayed
      • development
        • milestone
    • Delay, delayed
      • development
        • physiological
          • specified stage NEC
    • Delay, delayed
      • milestone
    • Late
      • talker
    • Late
      • walker

Clinical ClassificationClinical

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

CCSR SYM016
Other general signs and symptoms
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Child Development

As children grow older, they develop in several different ways. Child development includes physical, intellectual, social, and emotional changes.

Read the full article at MedlinePlus

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

Convert R62.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
783.42 Delayed milestones
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About R62.0Overview

Is R62.0 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report delayed milestone in childhood on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does R62.0 group to?

When delayed milestone in childhood is the principal diagnosis on an inpatient stay, it groups to MS-DRG 640, 641, with relative weights from 0.7782 to 1.3356 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R62.0 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the delayed milestone in childhood is established, that condition takes the principal position instead.

Who can R62.0 be reported for?

The Medicare Code Editor checks delayed milestone in childhood against patient demographics: this code is intended for pediatric patients (age 0 through 17). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of R62.0?

Under the General Equivalence Mappings, delayed milestone in childhood converts to ICD-9-CM 783.42 (delayed milestones). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.