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v1.0.0
ICD-10 Guide
DiagnosesAutistic Disorder

Autistic Disorder

ICD-10 Coding for Autistic Disorder(F84.0)

PRIMARY SPECIALTYPediatrics
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Autistic Disorder?
Essential facts and insights about Autistic Disorder

Key Clinical Considerations:

  • Persistent deficits in social communication and social interaction across multiple contexts.
  • Restricted, repetitive patterns of behavior, interests, or activities.
  • Symptoms must be present in the early developmental period.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Detailed patient history including developmental milestones.
  • Use of standardized assessment tools (e.g., ADOS, CARS).
  • Clear documentation of functional impairments in social, occupational, or other areas.

Coding Guidelines

Usage Guidelines & Examples

  • Follow ICD-10 guidelines for specificity in coding.
  • Common errors include using outdated codes or misclassifying severity.

Code Exclusions

Important Exclusions

  • Intellectual disability (F70-F79) without autism.
  • Other specified neurodevelopmental disorders (F80-F89).

Related ICD-10 Codes

Primary Codes
299.00
Autistic Disorder, Current or Active
299.01
Autistic Disorder, In Partial Remission
Ancillary Codes
R48.8
F84.0
.
Differential Codes
F84.5

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Pediatrics

Specialty Applications

  • Children diagnosed with Autism Spectrum Disorder.
  • Pediatric clinics, developmental-behavioral practices, and multidisciplinary teams.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What are the documentation requirements?

Comprehensive history, assessment results, and treatment plans must be documented.

What are the billing considerations?

Ensure proper coding to reflect the severity and type of autism for reimbursement.