Direct answer
Both can diagnose autism — and both are OHIP-covered. A developmental paediatrician provides a more thorough multi-tool assessment but typically has a 12–24 month wait. A general paediatrician has a shorter wait (3-6 months) and can provide a valid DSM-5 diagnosis for OAP registration. Many families pursue both simultaneously. Given the OAP's 5+ year wait with 71,263 children waiting, every month earlier matters.
General paediatrician: General child health focus — vaccinations, growth, illness, development. Can diagnose autism (DSM-5 diagnosis valid for OAP). Assessment length: typically 30-60 minutes for developmental concern. Wait for referral: typically 3-6 months. Tools used: varies — some use ADOS-2; others use clinical observation and parent history. OHIP-covered. Best for rural/Northern Ontario, straightforward presentations, when speed is the priority.
Developmental paediatrician: Neurodevelopmental disorders focus — autism, ADHD, learning disabilities, developmental delay. Can diagnose autism (DSM-5 diagnosis valid for OAP). Assessment length: 2-4 hours across multiple visits. Wait for referral: typically 12-24 months at major centres (Holland Bloorview, CHEO, SickKids, McMaster, Surrey Place, ErinoakKids). Tools used: standardized ADOS-2, ADI-R, Vineland Adaptive Behavior Scales, cognitive testing. OHIP-covered. Best for complex presentations, co-occurring ADHD/anxiety/intellectual disability, older children.
A registered psychologist (C.Psych. or Psych.Assoc.) can also diagnose autism in Ontario. A private psychologist assessment typically takes 4-8 weeks to complete at a cost of approximately $2,500-$4,000. It is not covered by OHIP, but it is accepted by AccessOAP for OAP registration.
Some employer benefit plans include coverage for psychological services. Check your plan before assuming you will pay the full cost out-of-pocket. The private assessment cost may be claimable under the Medical Expense Tax Credit on your federal tax return.
Recommended strategy: Ask your family doctor to refer to a developmental paediatrician AND a private psychologist simultaneously. If the private assessment comes first (typically 4-8 weeks), use it to register with AccessOAP immediately. Then continue with the public developmental paediatric assessment for the comprehensive multi-tool workup.
The OAP wait clock starts on the day your child's AccessOAP registration is submitted — not the date of diagnosis, and not the date of referral. With 71,263 children waiting for Core Clinical Services funding and a 5+ year average wait, every month earlier on the waitlist is meaningful.
A family that gets a private diagnosis in 6 weeks and registers with AccessOAP immediately will typically be 18+ months ahead in the queue compared to a family that waited for the public developmental paediatric assessment alone. Both diagnoses are equally valid — the difference is entirely in timing.
For straightforward presentations in young children with clear early signs, a general paediatrician who is experienced with autism can provide a timely, valid diagnosis — particularly valuable in regions where developmental paeds are not accessible. For older children, complex presentations, or where co-occurring ADHD, intellectual disability, or anxiety is suspected, the developmental paediatrician's more thorough multi-tool assessment is generally preferable.
OHIP
Ontario Health Insurance Plan — diagnostic assessment coverage
DSM-5
Diagnostic and Statistical Manual of Mental Disorders, 5th ed.
AccessOAP
Ontario Autism Program registration — accepts diagnoses from paediatrician, developmental paediatrician, and registered psychologist
Autism assessment in Ontario: OHIP-covered assessments at hospital hubs are free but have 3-5 year waits. Private comprehensive assessments cost $3,000-$5,000. Learn your options.
In Ontario, autism can be diagnosed by psychologists, developmental pediatricians, psychiatrists, and some pediatricians. Learn the pathways and costs.
How to tell autism and speech delay apart in toddlers — key differences, what they share, joint attention, and the diagnostic pathway in Ontario.
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 long does autism diagnosis take in Ontario?
Before joining the OAP waitlist, Ontario diagnostic waitlists average 12–24 months at public hospitals. This pre-waitlist delay means total time from first concern to therapy often exceeds 5–7 years, an invisible bottleneck in official statistics.
Source: Ontario Autism Program [OAP] · Verify Link
Is private autism assessment faster in Ontario?
Private autism assessments cost $2,500–$4,000 but reduce wait times from years to weeks. Many families face the choice of paying out-of-pocket to access the OAP sooner or waiting while their child misses the critical early intervention window.
Source: Ontario Autism Program [OAP] · Verify Link
How much does an autism diagnosis cost in Ontario?
Public autism assessments in Ontario are free through OHIP but have 12-24 month waits. Private assessments cost $2,500–$4,000 with 2-4 month wait times. Psychological associates typically charge less than registered psychologists. Virtual assessments may cost $1,500–$2,500.
Source: Ontario Psychological Association · Verify Link
Who can diagnose autism in Ontario?
In Ontario, autism can be diagnosed by: registered psychologists, psychological associates, developmental pediatricians, pediatricians with autism training, psychiatrists, and neurologists. Assessments must follow DSM-5 criteria. OAP accepts diagnoses from any qualified professional meeting ministry criteria.
Source: College of Psychologists and Behaviour Analysts of Ontario · Verify Link
Written by Spencer Carroll
Founder & Autism Advocate