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 69,166 children waiting, every month earlier matters.
Start with the short answer, then reveal deeper context where helpful.
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.
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 $2,000-$4,500. It is not covered by OHIP, but it is accepted by <a href="/oap-funding-guide" class="text-blue-600 hover:underline font-medium">AccessOAP</a> for OAP registration.
The OAP wait clock starts on the day your child's <a href="/oap-funding-guide" class="text-blue-600 hover:underline font-medium">AccessOAP</a> registration is submitted — not the date of diagnosis, and not the date of referral. With 69,166 children waiting for Core Clinical Services funding and a 5+ year average wait, every month earlier on the waitlist is meaningful.
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 $2,000-$4,500. It is not covered by OHIP, but it is accepted by <a href="/oap-funding-guide" class="text-blue-600 hover:underline font-medium">AccessOAP</a> 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 <a href="/oap-funding-guide" class="text-blue-600 hover:underline font-medium">AccessOAP</a> 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 <a href="/oap-funding-guide" class="text-blue-600 hover:underline font-medium">AccessOAP</a> registration is submitted — not the date of diagnosis, and not the date of referral. With 69,166 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 <a href="/oap-funding-guide" class="text-blue-600 hover:underline font-medium">AccessOAP</a> 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
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.
Verified Facts