ICD-10-CM code · FY2027

F84.9 Pervasive developmental disorder, unspecified

BillableValid for claims as a specific diagnosis code

About F84.9

Code: F84.9
Billable: Yes
Short description: Pervasive developmental disorder, unspecified
Category: F84 Pervasive developmental disorders
Block: F80-F89 Pervasive and specific developmental disorders
Chapter: 5 Mental, Behavioral and Neurodevelopmental disorders
Code set: FY2027, October 1, 2026 to September 30, 2027

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Coding notes for F84.9

Applicable to Other names for conditions reported with this code.

Atypical autism

Also applies, from F84 Pervasive developmental disorders

Code also Another code may be needed as well; the order depends on the encounter.

any associated medical condition and intellectual disabilities

Chapter 5 notes (apply to every code in it)

Includes Conditions this code covers.

disorders of psychological development

Excludes2 Not part of this condition, but a patient can have both: report both codes when both apply.

symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Related codes in F84

F84.0 Autistic disorderBillable
F84.2 Rett's syndromeBillable
F84.3 Other childhood disintegrative disorderBillable
F84.5 Asperger's syndromeBillable
F84.8 Other pervasive developmental disordersBillable

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A non-invasive neurostimulation intervention may improve social communication impairment in children with autism spectrum disorderMay 5, 2026 · Chronic Disease
Prenatal exposure to components of fine particulate matter is associated with increased risk of autism spectrum disorderOct 27, 2025 · Chronic Disease
Use of memantine may improve social functioning in youths with autism spectrum disorderOct 7, 2025 · Chronic Disease
Topiramate for prenatal antiseizure therapy is not associated autism spectrum disorderMay 22, 2024 · Neurology
Novel neuroanatomical endophenotypes identified in autism spectrum disorderApr 24, 2023 · Imaging and Intervention

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ICD-10-CM FY2027 code set, as published by the CDC National Center for Health Statistics (NCHS) and CMS, effective October 1, 2026 to September 30, 2027. Codes, titles and notes are shown as published. Check payer rules and the official guidelines before billing. This page is not medical advice.