Evidence supports autism screening and intervention commencing in the first 2 years of life — earlier identification directly enables earlier intervention during the highest neural plasticity window
Getting a diagnosis
Signs, screening, who can assess, and how long it takes.
- Running time 0:49 Getting a diagnosis
Autism Diagnosis Wait Times in Ontario
A confirmed autism diagnosis is required to register with the Ontario Autism Program. - Running time 0:49 Getting a diagnosis
Autism Screening Tools Used in Ontario
Ontario's enhanced 18-month visit uses a developmental screen and a parent questionnaire. - Running time 0:51 Getting a diagnosis
Autism Services Covered by OHIP in Ontario
OHIP covers physician and psychiatrist assessments for autism diagnosis, including developmental pediatrician consultations. - Running time 0:55 Getting a diagnosis
Autism Spectrum Disorder: Understanding ASD and Its Spectrum
The term "spectrum" acknowledges that autism does not look the same in every person. - Running time 0:49 Getting a diagnosis
Can a Family Doctor Diagnose Autism in Ontario?
Some general pediatricians with specialized training in developmental assessment can diagnose autism. - Running time 0:45 Getting a diagnosis
Do I Have Autism? Signs, Self-Check & Next Steps
Only a qualified health professional can diagnose autism. - Running time 0:54 Getting a diagnosis
Family Doctor Autism Referral Guide (Ontario)
Ontario uses the M-CHAT-R/F (18-month and 24-month checkpoints) as a primary-care screening tool. - Running time 0:51 Getting a diagnosis
Find the next right step for an autism assessment
Ask who will complete the assessment and what credentials they hold. - Running time 0:40 Getting a diagnosis
How to Get an Autism Diagnosis Without a Family Doctor in Ontario
Ask the psychologist whether they take direct contact from families or need a referral. - Running time 0:33 Getting a diagnosis
How to Get Your Child Diagnosed with Autism in Ontario
Start with your child's doctor, or contact a diagnostic hub directly. - Running time 0:54 Getting a diagnosis
Late Autism Diagnosis: Why It Happens and What to Do
Masking throughout childhood often delays recognition of autism signs - Running time 0:46 Getting a diagnosis
Paediatrician vs. developmental paediatrician for autism in Ontario
A registered psychologist or psychological associate can also diagnose autism in Ontario. - Running time 0:53 Getting a diagnosis
What Happens in the Room?
A full autism assessment may include intake, observation, caregiver interview, and feedback sessions. - Running time 0:39 Getting a diagnosis
What Is Autism (ASD)? A Complete Guide for Canadian Families
The word “spectrum” means that autistic people differ a lot from each other. - Running time 0:52 Getting a diagnosis
ADOS-2 Test
A trained clinician sets up short activities and watches how a person communicates, plays and interacts. - Running time 0:54 Getting a diagnosis
Adult Autism Diagnosis in Ontario: Routes, OHIP, Wait Times
CAMH says a physician or a nurse practitioner makes the referral. - Running time 0:53 Getting a diagnosis
Autism and ADHD: Understanding Co-Occurrence in Ontario
Research shows that ADHD commonly co-occurs with autism. - Running time 0:46 Getting a diagnosis
Autism Health Information for Ontario Families
Access to diagnosis and support is not the same for every family. - Running time 0:52 Getting a diagnosis
Autism Levels 1, 2, and 3: What Do They Mean?
A level describes support needs at one point in time, not ability or worth. - Running time 0:52 Getting a diagnosis
Autism Masking: Hiding Autistic Traits to Fit In
Masking can make it very difficult for clinicians to recognize autism - Running time 0:56 Getting a diagnosis
Autism Screening Tools: What They Can and Cannot Tell You
Screening is a brief first step that identifies who should receive a full assessment. - Running time 0:47 Getting a diagnosis
CAMH Adult Autism Assessment in Ontario
A full adult autism assessment, wherever it happens, usually involves developmental history, diagnostic interview, and often standardized measures. - Running time 0:45 Getting a diagnosis
Find the autism diagnosis path in your province
Autism diagnosis involves a full developmental assessment by a qualified professional - Running time 0:54 Getting a diagnosis
How Long Does an Autism Assessment Take?
Private waits vary, so ask clinics about timing, visits and when the written report will arrive. - Running time 0:53 Getting a diagnosis
How long does an autism diagnosis take in Ontario?
Public and private assessment timing varies by region, provider, referral question, and capacity. - Running time 0:49 Getting a diagnosis
Private Autism Assessment in Ontario
Compare public and private routes by eligibility, assessment scope, current intake, and fee. - Running time 0:49 Getting a diagnosis
Signs of autism in toddler girls
A low M-CHAT score with strong parental concern still warrants a conversation about assessment. - Running time 0:39 Getting a diagnosis
Surrey Place vs. ErinoakKids Autism Assessment
Choose based on geography, the catchment boundary determines which centre you apply to. - Running time 0:51 Getting a diagnosis
When autism and ADHD may both be part of the picture
A qualified clinician can assess whether both are present. - Running time 0:50 Getting a diagnosis
Why Are Girls Diagnosed with Autism Later in Ontario?
In Ontario, speaking up early for an assessment can matter. - Running time 0:46 Getting a diagnosis
Out-of-country autism diagnosis: is it valid for OAP?
AccessOAP decides whether a diagnosis from outside Canada is accepted. - Running time 0:50 Getting a diagnosis
Re-Diagnosis of Autism: When Diagnostic Criteria Change
The two-domain criteria (social communication + restricted/repetitive behaviours) replaced the three-domain model.
Sources on this page
The source chain stays visible.
Key claims are paired with their source, evidence tier, and verification date so readers can inspect the public record directly.
Facts 3
Sources 3
Primary source Zwaigenbaum L, Bauman ML, Stone WL, et al. (2015) Verified 2015-10-01
1 in 50
According to the 2019 Canadian Health Survey on Children and Youth, about 1 in 50 children and youth aged 1 to 17 in Canada had an autism diagnosis
Primary source Public Health Agency of Canada (2024) Verified 2024-03-26
WHO recommends accessible, community-based early interventions for children with autism. Timely evidence-based psychosocial interventions improve communication and social engagement
Primary source World Health Organization (2025) Verified 2025-09-17
Open complete source list(3)
Last system verification: 2026-11-03. Next scheduled update: 2027-02-01.
About this page
Check the author’s context, review method, and how to report an error.
Written by Spencer Carroll
Founder & Autism Advocate
Lived experience: Parent of autistic child in the OAP system