Autism Evaluation for Kids: When to Get One and What to Expect

Consider an autism evaluation for your child if you, your pediatrician, a teacher, or a screening tool has noticed differences in communication, social connection, play, or repetitive behaviors. An evaluation is done by trained specialists, such as a developmental pediatrician or child psychologist, and usually includes observation, structured activities, and questions for you. You can start by asking your pediatrician for a referral.

Key takeaways

• A screening flags a possible concern. A diagnostic evaluation answers the question.
• The CDC says a diagnosis by an experienced professional can be considered reliable by age 2.
• Developmental pediatricians, child psychologists, speech-language pathologists, and occupational therapists may be involved.
• Bring notes, short videos, and your questions. You are an important part of the evaluation.
• In Orange County, common paths include your pediatrician, your health plan, and the Regional Center of Orange County.

When to consider an autism evaluation

There is no single right moment. Many families seek an evaluation after one or more of these:

• You have noticed early signs. For example, your child does not respond to their name, uses few gestures, does not point to share interest, or plays the same way every time. Our guide to early signs of autism lists signs by age.
• A screening raised a concern. Your pediatrician may use a short autism screening questionnaire at a well-child visit.
• A teacher or caregiver mentioned something. Preschool staff see your child with peers every day.
• Your child seems to lose skills. If words or skills your child used to have seem to fade, tell your doctor.
• Your gut tells you something is different. Your observations count, even if others say to wait.

Autism is not only found in toddlers. The CDC notes that while a diagnosis can be reliable by age 2, many children are diagnosed much later in childhood, and some as adolescents or adults. If your school-age child is struggling socially or with change, an evaluation can still help.

Screening vs. diagnostic evaluation

These two steps are often confused. They do different jobs.

	Screening	Diagnostic evaluation
Purpose	Flags whether a child may need a closer look	Determines whether a child meets criteria for autism
Who does it	Often a pediatrician or nurse during a well-child visit	One or more trained specialists
How long	Usually short, often a parent questionnaire	Longer, may take more than one visit
Result	“No concern” or “refer for evaluation”	A diagnosis or not, plus recommendations

According to the CDC, the American Academy of Pediatrics recommends autism-specific screening at 18 and 24 months, along with general developmental screening at 9, 18, and 30 months. A screening result is not a diagnosis. A child who screens positive is referred for a fuller look, and a child who screens negative can still be evaluated if concerns continue.

Who diagnoses autism?

The CDC explains that a comprehensive developmental evaluation may involve one or more trained specialists, such as:

• Developmental pediatricians, who focus on child development and developmental differences
• Child psychologists, who assess thinking, learning, behavior, and social-emotional development
• Speech-language pathologists, who look closely at communication and language
• Occupational therapists, who look at motor skills, daily living skills, and sensory responses

Some children see one specialist. Others are seen by a team. Your health plan or pediatrician can tell you which specialists are available to your child.

For guidance on how doctors identify and evaluate autism, the American Academy of Pediatrics published a clinical report for pediatricians in 2020.

What happens during an autism evaluation

Every evaluation is a little different, but most include similar parts. The CDC lists observing the child, giving structured tests, interviewing parents, and asking parents to fill out questionnaires.

Talking with you

The specialist will ask about your child’s development from birth to now. Expect questions about:

• When your child reached milestones like babbling, first words, and walking
• How your child communicates what they want
• How your child plays, alone and with others
• Routines, interests, and how your child handles change
• Sleep, eating, and sensory preferences
• Family history and any past evaluations

Watching and playing with your child

Much of the evaluation looks like play. The specialist may blow bubbles, read a book, or set up a toy and watch how your child responds, shares attention, and communicates. There is no pass or fail. The goal is to see your child’s natural skills.

Questionnaires and structured activities

You may fill out forms about your child’s behavior at home. Your child may do activities that look at language, thinking, and daily living skills. Older children may also be asked about their own experiences.

Results and recommendations

Afterward, the specialist shares what they found. This may happen the same day or at a later appointment. A good report explains your child’s strengths, the areas where they may need support, and recommended next steps, such as speech therapy, occupational therapy, ABA, or school services.

Ask for a written copy. Your health plan, school, and therapy providers will likely need it.

How to prepare for your child’s evaluation

A little preparation helps the specialist see the full picture.

Gather notes. Write down specific examples, with dates when you can. “Does not turn when we call his name, even from a few feet away” is more useful than “doesn’t listen.”

Take short videos. Record everyday moments: playtime, mealtimes, a meltdown after a change in routine, how your child asks for things. Keep each clip under a minute or two.

Collect records. Bring prior screenings, therapy reports, early intervention records, and teacher notes.

Plan for your child’s comfort. Bring snacks, a favorite toy, and anything that helps your child feel calm. Tell the office in advance if your child has trouble with waiting rooms or loud spaces.

Bring your questions. Some families ask:

• What did you see today that stood out?
• What are my child’s strengths?
• What supports do you recommend first?
• What should I do while we wait for services?
• Will I get a written report, and when?

Paths to an autism evaluation in Orange County

Families in Westminster and across Orange County usually start through one or more of these routes.

Your pediatrician

Ask for a screening and a referral to a developmental pediatrician or psychologist. Your pediatrician can also help rule out other factors, such as hearing concerns.

Your health plan

Call member services and ask which specialists in your network do autism evaluations and whether you need a referral. Many Orange County Medi-Cal members are enrolled in CalOptima Health. If you have commercial insurance, the process is similar. Our guide to Medi-Cal coverage for ABA covers what happens after a diagnosis.

The Regional Center of Orange County

The Regional Center of Orange County (RCOC) serves children and adults with developmental disabilities, including autism. Its intake team assesses eligibility for:

• Early Start, for babies and toddlers from birth to 36 months
• Lanterman services, for people 3 and older with a qualifying developmental disability

For children under 3, California’s Department of Developmental Services says anyone can make a referral to Early Start, including parents, and that there is no cost for evaluation, assessment, and service coordination. Early Start eligibility is based on development and risk, so you do not need an autism diagnosis first. Our article on early intervention for autism explains how it works.

Your school district

From age 3, you can ask your local school district to assess your child for special education. A school assessment decides whether your child qualifies for services at school. It is usually separate from a medical diagnosis, and families often pursue both.

For a fuller list of local contacts, see our roadmap to autism support for parents in Orange County.

Please talk with your pediatrician or a qualified professional about your child’s specific situation.

What happens after a diagnosis

A diagnosis is information, not a verdict. It helps you understand how your child experiences the world and opens the door to support.

Next steps often include:

• Sharing the report with your pediatrician and health plan
• Starting recommended therapies, which may include ABA, speech, or occupational therapy
• Contacting your school district about an IEP, if your child is 3 or older
• Connecting with other parents and local family resource centers

Where United Autism Therapy fits

United Autism Therapy does not provide diagnostic evaluations. We work with children after a diagnosis or referral. Our BCBA- and RBT-certified team offers ABA therapy, speech and language therapy, occupational therapy, and parent training, and we help families work through coverage and authorization.

If you are waiting on an evaluation or just received results, we are glad to talk through what comes next.

Next steps

You do not have to have every answer before you call. We offer a free consultation to talk about your child and your options. Reach us at (714) 709-7819, Monday through Saturday, 8 AM to 6 PM, or send us a message.