Adult Assessment

Assessments for autism in adulthood are becoming more common as a result of expanding diagnostic criteria and a significant increase in awareness and understanding. The most common reasons that adults seek out diagnosis and support are difficulties with social interaction and mental health. An autism diagnosis can be a validating experience and can help adults better understand themselves and their experiences. 

Autism Ontario does not provide diagnosis; however, we can provide resources to assist people in their search for a qualified provider.

How to Access Adult Diagnosis in Ontario

Generally, adults are diagnosed either by a psychiatrist or a psychologist.

Diagnosis by a psychologist

  • Psychologists may be covered under the Ontario Health Insurance Program (OHIP) if they work in a public healthcare setting such as a hospital or clinic. To access a publicly funded psychologist, a person may request a referral from their general practitioner (e.g., physician or nurse practitioner) to a psychologist in a public health care setting. 
  • Psychologists also practice as private practitioners who work on a fee-for-service basis. To access a private psychologist, a person may self-refer, or be referred by their general practitioner. These fees would be out of pocket or may be funded by a private insurance plan (e.g., employment benefits). Unfortunately, Ontario Works and Ontario Disability Support Program (ODSP) do not normally fund psychological assessments. 

Diagnosis by a psychiatrist

  • Psychiatrists are covered under OHIP. To access a psychiatrist, a person may request a referral from their general practitioner (e.g., physician or nurse practitioner) to a psychiatrist in their community. 

It’s important to note that it is more common to be diagnosed by a psychologist compared to a psychiatrist. 


It is important to do your own research and make your own informed decisions. Please note that Autism Ontario does not endorse any specific therapy, product, treatment, strategy, opinions, service, or individual. We do, however, endorse your right to information.

Click here to read Autism Ontario’s full disclaimer.

Where to Get an Assessment

To find what region in Ontario you live in, visit our Find a Region webpage.

Central East Region

East Region

South Region

West Region

Central West Region

Toronto Region

North Region


Autism Ontario Learning Resources
Community Partner Resources