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Diagnostic Assessment Services

Looking for information on diagnostic assessments? You are in the right place.

We created this content so you know what to expect before, during, and after a diagnostic assessment. 

If your child has been referred to the CHEO Children’s Treatment Centre (CTC) for a diagnostic assessment, it is because there are concerns about your child’s skills, such as speech-language, learning-academics, play-social skills, and/or activities of daily living. The referral to our service may have been made by you, or someone else who knows your child well, such as a family doctor.

If your child has not been referred for a diagnostic assessment but you or someone else has concerns about their development, please self-refer using the referral form listed below, or speak with your child’s health-care provider to discuss a referral to our CTC. 

If your concerns are primarily related to language and speech, please complete the First Words communication checkup and speak with your child’s health care provider to discuss the e-screening results. 

If you are not sure whether your child is achieving their developmental milestones, please speak with your child’s health-care provider.

About Children’s Treatment Centres

Children’s Treatment Centres (CTCs), provide specialized diagnostic services when there are concerns about a developmental disability. CHEO’s CTC is located within the program of Development and Rehabilitation.

CTC diagnostic assessments are provided by professionals specialized in the assessment of developmental disabilities.

You may be wondering, what are developmental disabilities?

  • A developmental disability is a catch all or umbrella term to describe the difficulties experienced by a person who exhibits developmental, learning, or behavioural differences, when compared to persons of the same age. Some examples of common developmental disabilities include:
    • Autism Spectrum Disorder (ASD)
    • Global Developmental Delay (GDD)
    • Intellectual Disability (ID)
    • Developmental disabilities can be mild, moderate, or severe, depending on how much support the person needs. Support may be in the form of therapy, special education, or supervision.

About CTC Diagnostic Assessments

A diagnostic assessment is a specialized process where the goal is to learn more about a child’s developmental profile. Through this process you will learn more about your child’s developmental strengths and needs in areas such as: speech and language, motor skills, play, social skills, behaviour, and early learning. A diagnostic assessment may result in your child receiving a developmental diagnosis.

About this Website 

This website content was developed by health-care professionals involved in the assessment and treatment of children and youth with developmental disabilities. 


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