Getting an Autism Diagnosis as an Adult in Ontario

Ontario has very few publicly funded adult autism assessment services. The Centre for Addiction and Mental Health (CAMH) in Toronto operates an Adult Autism Spectrum Disorders Service that provides comprehensive assessments by referral from a physician or psychiatrist. Wait times can be 1-3 years. Some academic health centres (e.g., University Health Network) may offer adult assessments through research programs — check directly with local hospitals.

Private neuropsychologists and registered psychologists offer adult autism assessments across Ontario. Costs range from $3,000-$6,000 for a comprehensive evaluation including clinical interview, standardized tools (ADOS-2 for adults, RAADS-R, Vineland-3), cognitive assessment, and written report. Some clinicians specialize in late-diagnosed adults and gender-diverse individuals.

Ontario has no dedicated adult autism program equivalent to the OAP for children. However, an adult autism diagnosis is valuable for: requesting workplace accommodations under the Ontario Human Rights Code; applying for ODSP if the disability substantially impairs the ability to work; accessing post-secondary academic accommodations through Accessible Learning Services; qualifying for the Disability Tax Credit (DTC) and RDSP; and personal self-understanding and connecting with autistic community.

Adults who receive a late diagnosis often report significant relief and improved self-compassion after understanding their experiences through an autism lens. Peer support communities, autistic-led organizations like Autistic Self Advocacy Network Canada, and autism-informed therapists can provide ongoing support following diagnosis.