What Happens During an Autism Evaluation?
Medically reviewed by Dr. Emily Torres, PhD, CCC-SLP · Pediatric Speech-Language Pathologist
Content reviewed against published AAP, CDC, NIH guidelines
Last reviewed:
Behavioral development varies greatly from child to child. If you have noticed what happens during an autism evaluation, here is what you need to know.
The short answer
An autism evaluation typically involves multiple professionals including a developmental pediatrician, psychologist, or multidisciplinary team. The process includes parent interviews about developmental history, standardized observation tools like the ADOS-2, cognitive and language assessments, and review of development. The evaluation usually takes several hours and may be split across multiple sessions. Results lead to a clear diagnostic conclusion and recommendations.
Key takeaways
- An autism evaluation typically involves multiple professionals including a developmental pediatrician, psychologist, or multidisciplinary team. The process includes parent interviews about developmental history, standardized observation tools like the ADOS-2, cognitive and language assessments, and review of development. The evaluation usually takes several hours and may be split across multiple sessions. Results lead to a clear diagnostic conclusion and recommendations.
- Usually normal when: Your child has been screened and does not require comprehensive evaluation
- Call your doctor if: Your child needs evaluation but wait times are very long and development is regressing
- Varies by age — see the age-by-age breakdown below
Parents everywhere have the same worry. You are doing the right thing by looking into it.
What Parents Should Know
According to AAP, CDC, NIH guidelines, an autism evaluation typically involves multiple professionals including a developmental pediatrician, psychologist, or multidisciplinary team. The process includes parent interviews about developmental history, standardized observation tools like the ADOS-2, cognitive and language assessments, and review of development. The evaluation usually takes several hours and may be split across multiple sessions. Results lead to a clear diagnostic conclusion and recommendations. At 18-24 months, evaluations at this young age focus on social communication, joint attention, play skills, and sensory behaviors. The ADOS-2 Toddler Module can be used for children as young as 12 months. Diagnosis at this age is possible but may be provisional. It is generally considered normal when your child has been screened and does not require comprehensive evaluation. However, you should contact your pediatrician promptly if your child needs evaluation but wait times are very long and development is regressing.
Normal vs. Concerning
By Age
What to expect by age
18-24 months
Evaluations at this young age focus on social communication, joint attention, play skills, and sensory behaviors. The ADOS-2 Toddler Module can be used for children as young as 12 months. Diagnosis at this age is possible but may be provisional.
24-36 months
This is a common age for comprehensive evaluation. Clinicians observe social interaction, communication, play, and repetitive behaviors. Parent interviews provide developmental history. Cognitive and language testing may be included.
3-4 years
Evaluation is more straightforward at this age as behaviors are more observable. The process typically includes the ADOS-2, cognitive testing, language evaluation, and parent questionnaires. A clear diagnosis can usually be made.
4-5 years
Evaluations may also include assessment of adaptive behavior, academic readiness, and social skills. Results guide both diagnosis and educational planning.
5-6 years
For children not diagnosed earlier, evaluations at this age often involve school observations in addition to clinical assessment. Results help with school placement and service planning.
What to Tell Your Pediatrician
- Describe when you first noticed what happens during an autism evaluation and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your child has been referred for evaluation and you want to understand the process.
- Mention if you are waiting for an evaluation appointment and want to know what to expect.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Your child has been screened and does not require comprehensive evaluation
- Your child was evaluated and autism was ruled out
- Your child is developing typically and screening was precautionary
- Your child has been referred for evaluation and you want to understand the process
- You are waiting for an evaluation appointment and want to know what to expect
- You have questions about whether your child needs an evaluation
- Your child needs evaluation but wait times are very long and development is regressing
- Your child has been diagnosed and needs intervention services to start immediately
What You Can Do at Home
- Keep track of when you notice what happens during an autism evaluation — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that your child has been screened and does not require comprehensive evaluation — this is generally within the range of normal.
- At 18-24 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Respond consistently and calmly to your baby's behavior. Maintain predictable daily routines.
- While monitoring at home, seek immediate care if your child needs evaluation but wait times are very long and development is regressing.
Related Conditions
Worried About Autism - When and How to Screen
The AAP recommends autism screening at 18 and 24 months for all children, using the M-CHAT-R/F questionnaire. If you have concerns before these ages, you can request screening earlier. Early signs of autism may include limited eye contact, no pointing by 12 months, no words by 16 months, no pretend play by 18 months, or loss of any previously acquired skills. Trust your instincts as a parent and raise concerns with your pediatrician.
My Toddler Failed the M-CHAT Autism Screening
Failing the M-CHAT (Modified Checklist for Autism in Toddlers) does not mean your child has autism. It means additional evaluation is recommended. Many children who fail the initial M-CHAT screen do not receive an autism diagnosis after comprehensive evaluation. The important next step is to complete the follow-up interview (M-CHAT-R/F) with your pediatrician and, if indicated, pursue a developmental evaluation.
Processing Your Child's Autism Diagnosis
Receiving an autism diagnosis for your child brings a range of emotions including grief, relief, confusion, and determination. These feelings are all normal and valid. What matters most is that early intervention significantly improves outcomes. Most families find that connecting with other parents, starting services quickly, and learning about their child's unique strengths and needs helps them move forward with confidence.
Related Resources
Milestone Checklists by Age
Track your baby's developmental milestones from birth to 5 years with age-specific checklists.
Month-by-Month Development
Detailed monthly development guides from birth through 24 months.
When to Call the Doctor
General guide on when to call the pediatrician, visit urgent care, or go to the ER.
Frequently asked questions
Is what happens during an autism evaluation normal?
When should I call the doctor about what happens during an autism evaluation?
When is what happens during an autism evaluation normal?
What causes what happens during an autism evaluation?
What should I mention to my pediatrician about what happens during an autism evaluation?
Is what happens during an autism evaluation normal at 18-24 months?
Is what happens during an autism evaluation normal at 24-36 months?
Should I go to the ER for what happens during an autism evaluation?
Does what happens during an autism evaluation go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss What Happens During an Autism Evaluation?.
Things to mention
- Describe when you first noticed what happens during an autism evaluation and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your child has been referred for evaluation and you want to understand the process.
- Mention if you are waiting for an evaluation appointment and want to know what to expect.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Your child has been referred for evaluation and you want to understand the process
- You are waiting for an evaluation appointment and want to know what to expect
- You have questions about whether your child needs an evaluation
Urgent signs to report immediately
- Your child needs evaluation but wait times are very long and development is regressing
- Your child has been diagnosed and needs intervention services to start immediately
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of what happens during an autism evaluation are normal. Talk to your pediatrician if your child needs evaluation but wait times are very long and development is regressing.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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Related Behavior Concerns
Worried About Autism - When and How to Screen
The AAP recommends autism screening at 18 and 24 months for all children, using the M-CHAT-R/F questionnaire. If you have concerns before these ages, you can request screening earlier. Early signs of autism may include limited eye contact, no pointing by 12 months, no words by 16 months, no pretend play by 18 months, or loss of any previously acquired skills. Trust your instincts as a parent and raise concerns with your pediatrician.
My Toddler Failed the M-CHAT Autism Screening
Failing the M-CHAT (Modified Checklist for Autism in Toddlers) does not mean your child has autism. It means additional evaluation is recommended. Many children who fail the initial M-CHAT screen do not receive an autism diagnosis after comprehensive evaluation. The important next step is to complete the follow-up interview (M-CHAT-R/F) with your pediatrician and, if indicated, pursue a developmental evaluation.
Processing Your Child's Autism Diagnosis
Receiving an autism diagnosis for your child brings a range of emotions including grief, relief, confusion, and determination. These feelings are all normal and valid. What matters most is that early intervention significantly improves outcomes. Most families find that connecting with other parents, starting services quickly, and learning about their child's unique strengths and needs helps them move forward with confidence.
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