Direct answer
OAP does not require the diagnosing practitioner to be Canadian-licensed. International autism diagnoses are accepted by AccessOAP if they clearly state a DSM-5 ASD (or equivalent ICD-11 ASD) diagnosis, are in English or French (or accompanied by a certified translation), and identify the diagnosing practitioner with credentials. The key requirement is meeting DSM-5 ASD criteria — not where the assessment was performed.
Diagnoses from the US, UK, and Australia are generally accepted because their psychiatric and psychological standards closely align with DSM-5. US practitioners typically use DSM-5 directly. UK and Australian practitioners may use ICD-11, which includes equivalent ASD diagnostic criteria.
Contact AccessOAP at 1-833-425-2445 to confirm whether your specific documentation is sufficient before pursuing a new assessment.
A certified translation is required if your diagnosis document is not in English or French. This means a sworn or certified translator — not Google Translate or an informal translation.
In Canada, certified translators are typically members of the Association of Translators and Interpreters of Ontario (ATIO) or equivalent provincial bodies. Translation agencies in Ontario that handle official documents can provide certified translations.
Most practical first step: contact the original diagnosing clinician and request a clarification letter explicitly adding DSM-5 ASD diagnostic language confirming the original findings meet DSM-5 criteria. Typically $200-$500.
If the original clinician is not accessible, a Canadian psychologist or developmental paediatrician can review the existing assessment and provide a DSM-5 confirmation letter — less expensive than a full re-assessment.
Full new Canadian DSM-5 assessment: private $2,500-$4,000 (4-8 weeks); public 12-24 months (OHIP-covered).
If your child was diagnosed using DSM-IV categories (Autistic Disorder, Asperger's Disorder, PDD-NOS), the diagnosis will likely need to be updated to DSM-5 ASD before AccessOAP accepts it.
Options: request an updated DSM-5 letter from the original diagnosing practitioner (often a review appointment, $200-$500), or get a new Canadian DSM-5 assessment.
AccessOAP
Ontario Autism Program registration intake — 1-833-425-2445
ATIO
Association of Translators and Interpreters of Ontario — certified translator directory
Not automatically. OAP requires a DSM-5 ASD diagnosis. DSM-IV categories like Asperger’s Disorder and PDD-NOS were replaced in 2013. An updated letter from the original clinician is often faster and less costly than a full new assessment.
OHIP waiting period, OAP waitlist restart, no funding transfer from another province — what to expect when moving to Ontario with an autistic child.
In Ontario, autism can be diagnosed by psychologists, developmental pediatricians, psychiatrists, and some pediatricians. Learn the pathways and costs.
Commitment to Accuracy: Our data is verified against official government reports (FAO, MCCSS), peer-reviewed scientific literature, and accessible public records. Last updated: March 24, 2026.
How many children are on the Ontario autism waitlist in 2026?
As of May 13, 2026, 91,974 children are registered with the Ontario Autism Program. However, only 20,711 (22.5%) have an active Core Funding Agreement. This represents ~300% growth in registrations since 2019, with 71,263 children still waiting for essential funding.
Source: MCCSS FOI via OAC · Mar 2026, FAO Report 2024 · Verify Link
Written by Spencer Carroll
Founder & Autism Advocate