Adult Autism Diagnosis in Ontario: Routes, OHIP, Wait Times

CAMH says a physician or a nurse practitioner makes the referral.

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Adult Autism Diagnosis in Ontario: Routes, OHIP, Wait Times CAMH says a physician or a nurse practitioner makes the referral. Each private provider sets its own fee. Open the public register of the College of Psychologists and Behaviour Analysts of Ontario. Use the authorized client population filter to choose Adults. CAMH says an adult diagnosis needs evidence of autism in early childhood. The Ontario Autism Program serves children and youth, so it is not an adult funding route. Read the guide www.endthewaitontario.com/late-autism-diagnosis-adults-ontario

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CAMH says a physician or a nurse practitioner makes the referral. A short explainer with music and captions. 54 seconds.

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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

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

US$2.4M

Lifetime support costs for autism with co-occurring intellectual disability can reach US$2.4 million per person (Buescher et al.)

Primary source Buescher et al. (2014) Verified 2014-08-01
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Last system verification: 2026-11-03. Next scheduled update: 2027-02-01.

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Written by Spencer Carroll

Founder & Autism Advocate

Lived experience: Parent of autistic child in the OAP system