Autism Evaluations & Diagnostic Support

You've noticed the signs. You've completed an online screener that said your child may be at risk for autism spectrum disorder (ASD). Now what?At Action Behavior Centers, we offer two types of autism evaluations to help families navigate their next steps: the Autism Diagnostic Observation Schedule, Second Edition (ADOS-2) and the Initial Diagnostic Evaluation (IDE). Both are designed to support the diagnostic process and open the door to early intervention services like applied behavior analysis (ABA) therapy.

What are the steps in the autism diagnostic process?

Wondering how to test for autism or where to begin an early autism evaluation? Here's what the process looks like at ABC.

1. Complete a no-cost online screener

The first step is completing a simple online autism screening tool that can be completed at home. Screeners can help identify your child's autism risk and give insight into whether further evaluation is needed. 

2. Schedule an autism evaluation

The next step is an in-person or telehealth evaluation. Children are also often referred for an evaluation after concerns come up at a pediatrician visit. Depending on your region and your child's needs, this may be an ADOS-2 or an Initial Diagnostic Evaluation (IDE)

3. Review results

After the evaluation, results are shared with your child's pediatrician or specialist. If your child completed an ADOS-2, we compile the results into a summary that goes directly to your child's doctor. If your child completed an IDE, a licensed psychologist will review findings with you directly.

4. Confirm diagnosis

Based on a combination of evaluation results, parent questionnaires, and your child's developmental history, your doctor or psychologist will determine whether your child meets the criteria for autism spectrum disorder. You'll receive guidance on what the diagnosis means and what comes next.

Why an autism diagnosis matters

Early diagnosis opens the door to early intervention, and early intervention has been shown to support better long-term outcomes for autistic children.1 Many families find that having a diagnosis brings clarity and opens doors to a support system they didn't have before.

A diagnosis is often required before a child can:

  • Access evidence-based autism services like ABA therapy
  • Receive insurance coverage for autism treatment

Qualify for special education support and school accommodations

The ADOS-2 evaluation

The Autism Diagnostic Observation Schedule, Second Edition (ADOS-2) is one of the most trusted tools used to assess autism in young children. It's a play-based assessment where one of our trained teammates spends time with your child one-on-one, observing how they communicate, interact, and play. The assessment is designed to feel natural for children, not like a doctor’s visit. Activities are tailored to your child's age and developmental level.

  • No-cost
  • 40-60 minutes
  • Play-based

A few things to know about the ADOS-2 at ABC:

  • Offered at no cost as a community benefit
  • Designed for children ages 18 months to 6 years old
  • Results are shared with your child's doctor, not given as a standalone diagnosis
  • Availability varies by location

The Initial Diagnostic Evaluation (IDE)

The IDE is conducted by licensed psychologists who use a variety of methods to determine whether a child meets the criteria for autism spectrum disorder as outlined in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5). An IDE focuses specifically on autism and does not assess for all possible childhood diagnoses. Here’s what the IDE may include:

  • Parent interviews
  • Direct observation  
  • Autism-specific assessment tools

A few things to know about the IDE at ABC:

  • Billed to insurance
  • Offered in-center or via telehealth
  • A psychologist walks you through the findings and explains whether your child meets the criteria for an autism diagnosis
  • You'll receive a written diagnostic report to share with other providers
  • Availability varies by location
Top ABA Therapy near you available at Action Behavior Centers

What’s the difference between an IDE and the ADOS-2?

Both evaluations are rooted in best practices and designed to support early identification of autism. Here's a simple breakdown to help you understand the difference. Not sure which evaluation makes sense for your child? Contact us, and we can help!

IDE

  • Conducted by licensed psychologist
  • Billed to insurance
  • Get a formal diagnosis with a written report
  • Ages vary by location
  • Conducted in-center or telehealth

ADOS-2

  • Conducted by trained ABC clinician
  • No cost
  • Get a summary sent to your child's doctor
  • For ages 18 months to 6 years
  • Conducted in-center

Frequently asked questions about autism testing

View all FAQs

Who can diagnose autism?

In the U.S., autism is diagnosed by qualified medical and mental health professionals through a comprehensive evaluation. This process may include direct observation, developmental history, caregiver interviews, and standardized diagnostic tools to determine whether a child meets criteria for autism spectrum disorder. Many children can be evaluated as early as 18 months old.

Professionals who may diagnose autism include:

  • Developmental pediatricians
  • Child psychologists or neuropsychologists
  • Child psychiatrists
  • Pediatric neurologists

Board Certified Behavior Analysts® (BCBAs®) may support the evaluation process, but a formal autism diagnosis is typically made by one of the specialists listed above.

How long does the autism evaluation process take?

It depends on which evaluation your child receives. The ADOS-2 assessment itself takes 40 to 60 minutes. The IDE is a longer process that includes a combination of parent interviews, direct observation, standardized tools, and a results review session. ABC checks insurance coverage before scheduling the IDE, so timelines can vary by location and plan. Contact us to get a better sense of what to expect in your area.

What happens after my child is diagnosed with autism?

A diagnosis is a starting point, not an ending. It gives your family clarity, direction, and access to supports that can help your child learn and grow. Your child is the same person they were before the diagnosis. It simply gives you a clearer picture of how they experience the world and how to support them best.

After a diagnosis, your child's pediatrician may recommend therapies based on your child's individual needs. One commonly recommended option is ABA therapy. At ABC, a BCBA completes an initial assessment and builds a personalized plan for your child based on family goals. Our admissions team also works with insurance providers to verify coverage before services begin. Contact us to learn about ABA therapy availability in your area or to schedule a tour of your nearest ABC center.

When did autism become a diagnosis in the United States?

Autism became a formal medical diagnosis in the U.S. in 1980, when the American Psychiatric Association recognized “Infantile Autism” in the Diagnostic and Statistical Manual of Mental Disorders (DSM-III). This marked an important shift by separating autism from childhood schizophrenia and creating consistent diagnostic criteria.

Over time, the understanding of autism expanded, leading to today’s diagnosis of autism spectrum disorder (ASD). Key milestones include:

  • 1943: Leo Kanner described early infantile autism
  • 1980 (DSM-III): Autism recognized as a formal diagnosis
  • 1987 (DSM-III-R): Criteria expanded, renamed Autistic Disorder
  • 1994 (DSM-IV): Autism-related conditions grouped under Pervasive Developmental Disorders (including Asperger’s syndrome), laying the groundwork for viewing autism as a "spectrum"
  • 2013 (DSM-5): All related diagnoses were unified under ASD, the standard used today