HealthAssure
HealthAssureGood Life
ICD10BillableValid for clinical use

ICD-10 Code F84.9: Pervasive developmental disorder, unspecified

F84.9 is a billable ICD-10 diagnosis code used to classify Pervasive developmental disorder, unspecified in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Mental, Behavioral and Neurodevelopmental disorders (F01-F99).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Mental, Behavioral and Neurodevelopmental disorders (F01-F99).

When is it used?

  • May be used when a clinician documents pervasive developmental disorder, unspecified in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
5Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
block
F80-F89Pervasive and specific developmental disorders
category
F84Pervasive developmental disorders
currentF84

Official coding notes

Inclusion terms
  • Atypical autism

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

PsychiatristClinical Psychologist

Coverage-related procedures and services

HCPCS XX000high
Not Applicable
Source: CMS coverage guidance
HCPCS G0451high
DEVELOPMENT TESTING, WITH INTERPRETATION AND REPORT, PER STANDARDIZED INSTRUMENT FORM
Source: CMS coverage guidance
CPT 96133high
NEUROPSYCHOLOGICAL TESTING EVALUATION SERVICES BY PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL, INCLUDING INTEGRATION OF PATIENT DATA, INTERPRETATION OF STANDARDIZED TEST RESULTS AND CLINICAL DATA, CLINICAL DECISION MAKING, TREATMENT PLANNING AND REPORT, AND INTERACTIVE FEEDBACK TO THE PATIENT, FAMILY MEMBER(S) OR CAREGIVER(S), WHEN PERFORMED; EACH ADDITIONAL HOUR (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 96132high
NEUROPSYCHOLOGICAL TESTING EVALUATION SERVICES BY PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL, INCLUDING INTEGRATION OF PATIENT DATA, INTERPRETATION OF STANDARDIZED TEST RESULTS AND CLINICAL DATA, CLINICAL DECISION MAKING, TREATMENT PLANNING AND REPORT, AND INTERACTIVE FEEDBACK TO THE PATIENT, FAMILY MEMBER(S) OR CAREGIVER(S), WHEN PERFORMED; FIRST HOUR
Source: CMS coverage guidance
CPT 96137high
PSYCHOLOGICAL OR NEUROPSYCHOLOGICAL TEST ADMINISTRATION AND SCORING BY PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL, TWO OR MORE TESTS, ANY METHOD; EACH ADDITIONAL 30 MINUTES (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 96136high
PSYCHOLOGICAL OR NEUROPSYCHOLOGICAL TEST ADMINISTRATION AND SCORING BY PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL, TWO OR MORE TESTS, ANY METHOD; FIRST 30 MINUTES
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
F84.9

Common synonyms

Pervasive developmental disorder, unspecifiedPervasive developmental disorder

Frequently asked questions

Code details

CodeF84.9
SystemICD10
Display namePervasive developmental disorder, unspecified
ChapterMental, Behavioral and Neurodevelopmental disorders (F01-F99)
BlockPervasive and specific developmental disorders

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Autism, autistic(childhood) (infantile)Delay, delayedDisability, disabilitiesDisorder(of)Disorder(of)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code F84.9 for Pervasive developmental disorder, unspecified | HealthAssure