Evidence supports autism screening and intervention commencing in the first 2 years of life — earlier identification directly enables earlier intervention during the highest neural plasticity window
Date:
Availability, referral rules, fees, and language capacity can change; confirm them directly with the relevant service before booking.
Direct answer
In Ottawa, children are assessed publicly through the Eastern Ontario diagnostic hub, CHEO and the Ottawa Children's Treatment Centre, or privately by registered psychologists and other qualified professionals. Adults use different routes. This page does not give an Ottawa wait time, because we found no official one as of October 13, 2026. Ask each service.
Autism assessment and diagnosis — Government of Ontario · Diagnostic Assessment Services — CHEO · Verified 2026-10-13
About This Article
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In brief
Quick Summary
- Public route: children are assessed at CHEO and the Ottawa Children’s Treatment Centre, with a referral from a physician or nurse practitioner made through the CHEO Access Team.
- Private route: ask for the assessor’s registration, tools, full written fee, report contents, language options and timing in writing.
- Adults: CHEO’s page describes assessments for children, and this page lists no Ottawa adult service. French-speaking families should ask each service what it can offer in French.
Local access directory
Verify the local route before you contact a provider
Official intake guidance and local directory leads are kept separate here. Confirm referral rules, service area, fees, and current intake directly with the named source.
Browse the Ontario service directoryCompare Ottawa assessment routes
Use the source links to confirm current route details before booking. CHEO pages read on October 13, 2026.
| Route | What to confirm | Source |
|---|---|---|
| Public route: CHEO | CHEO says an autism assessment needs a referral from a physician or a nurse practitioner, made through the CHEO Access Team. CHEO describes assessments for preschool children with developmental concerns and for school-age children with suspected autism. Confirm the current intake process with CHEO. | |
| Private route | Confirm the assessor's registration, total fee, report requirements, language capacity, and current availability before booking. | Autism assessment and diagnosis — Government of Ontario |
The public route: CHEO and the Eastern Ontario hub
Ontario names the Children's Hospital of Eastern Ontario (CHEO) and the Ottawa Children's Treatment Centre (OCTC) as the Eastern Ontario diagnostic hub. What follows comes from CHEO's own pages, read on October 13, 2026. Rules can change, so confirm them with CHEO.
- Start with a referral. CHEO says a referral from a physician (family doctor, pediatrician or pediatric subspecialist) or a nurse practitioner is required for an autism assessment. Our family doctor autism referral guide explains what a doctor sends.
- No family doctor? CHEO points to Health Care Connect, the Ontario service that helps people find a doctor or nurse practitioner accepting new patients.
- The referral goes to the CHEO Access Team. CHEO says all referrals are made through it. The Access Team page also says families can call it directly, so ask how that fits with the referral rule for your child. ontario.ca lists 613-737-2757 and 1-800-565-4839 for the Eastern Ontario hub.
- Mostly a speech concern? CHEO asks you to complete the First Words communication checkup and talk with your child's health care provider about the results.
- The first visit. CHEO says only parents or legal guardians can bring the child to the first appointment, and it asks that brothers and sisters stay home. Bring your child's health card and any reports CHEO has not seen. CHEO says appointments can sometimes last a few hours.
- Who sees your child. CHEO says a psychologist or a developmental pediatrician or pediatrician asks about development, observes play and social interaction, may give problem-solving tests, and does a medical exam if appropriate.
- Already assessed? CHEO says it does not provide reassessments or second opinions for people who have already had an autism assessment or diagnosis. If you already have a report, CHEO asks you to tell them ahead of time.
For what happens in the room, read what happens at an autism assessment. For CHEO's OAP and family services, see the CHEO provider profile.
The private route: how to compare Ottawa assessors
Psychologists and other qualified professionals also assess autism in Ottawa. This page names no private clinic. Ask any assessor these questions and get the answers in writing.
| Question | Why it matters | Where to check |
|---|---|---|
| Are you registered, and with whom? | Ontario lists doctors, psychologists, psychological associates and nurse practitioners among those who can diagnose autism. | For psychologists, the CPBAO register (Find a Member). Doctors and nurse practitioners have their own colleges. |
| Which tools do you use, and which ADOS-2 module? | Tools vary, and no tool diagnoses on its own. | Ask, then read the ADOS-2 test explained. |
| Which ages do you assess? | Some assessors see children only. Some see adults. | Ask in writing. |
| English, French or both? | Confirm that the language covers testing, the feedback meeting and the report, not only the first call. | Ask, then read bilingual assessment in Ontario. |
| What is the full written fee, and what does it include? | Fees differ by clinic. Ask whether the fee covers the report, the feedback meeting and taxes. | Ask for an itemised quote, then see autism assessment costs in Ontario. |
| How long until the appointment and the report? | Timing differs by clinic, and this page gives no figure. | Ask for dates in writing. |
| Will the report include everything Ontario requires for OAP registration? | OAP registration needs a written diagnosis with specific details. | See what the written report should contain. |
| Do I need a doctor's note, or can I book directly? | Referral rules differ by clinic. | Ask, then compare routes on private autism assessment in Ontario. |
Adult autism assessment in Ottawa
CHEO's diagnostic assessment page describes assessments for preschool children and school-age children with suspected autism. It does not describe an adult assessment, and Ontario's diagnostic hub page is about assessing a child.
We could not verify an Ottawa adult autism assessment service on a provider's own site, so this page lists none. Adults can start by asking a family doctor which referral options exist, by comparing private assessors with the table above, and by reading the adult guides below.
French-language and bilingual assessment in Ottawa
CHEO's diagnostic page does not describe language services, so ask. Say you want French when your doctor makes the referral, and ask what can be done in French at each step. With a private assessor, ask whether testing, the feedback meeting and the written report are all offered in French.
Read bilingual autism assessment in Ontario and French-language autism services in Ontario for more.
What the assessment includes
Autism assessments in Ontario typically involve a records review, a parent interview, observation, other checks when needed, and a written report. See what an autism assessment includes and how the ADOS-2 test works.
Waiting, cost and coverage in Ottawa
Waiting
This page lists no Ottawa wait time. As of October 13, 2026, we did not find an official Ottawa autism assessment wait time on ontario.ca or CHEO's pages. CHEO's Access Team page says each of its services has its own wait list, and the wait depends on the service. See autism diagnosis wait times in Ontario and what the records show by region.
Cost
Ask CHEO to confirm any family cost on the public route. Private assessment fees are set by each clinic, and we found no Ottawa clinic fee list to cite. In a sample of 3 private Ontario provider pages checked August 12, 2026, advertised fees ran from $2,000–$6,000. That sample is not an Ottawa average and not a quote. Ask for an itemised written quote. See autism assessment costs in Ontario.
OHIP coverage
What OHIP covers depends on the service and the professional. Our OHIP coverage answer explains the difference.
After the report: registering with the OAP
Once you have a written diagnosis from a qualified professional, you can check eligibility and register for the Ontario Autism Program. The report checklist shows what the diagnosis must contain. Then follow how to register for the OAP.
Ottawa services directory
Our Ottawa regional guide and the CHEO provider profile list services in our directory. They cover programs and supports. They are not a list of autism assessors.
Sources read on October 13, 2026: Autism assessment and diagnosis, Government of Ontario; Diagnostic Assessment Services, CHEO; Access Team, CHEO.
Ottawa FAQ
Children can be assessed publicly through the CHEO and Ottawa Children’s Treatment Centre hub, with a referral from a physician or nurse practitioner made through the CHEO Access Team, or privately by a qualified professional. Adults use different routes. This page lists no Ottawa wait time, so ask each service.
Yes, CHEO says a referral from a physician or nurse practitioner is required. A psychologist or a developmental pediatrician or pediatrician asks about development, observes play and social interaction, may give problem-solving tests, and does a medical exam if appropriate. CHEO says appointments can sometimes last a few hours.
CHEO’s diagnostic assessment page describes assessments for preschool children and school-age children with suspected autism. It does not describe an adult assessment. This page lists no Ottawa adult service because we could not verify one on a provider’s own site. Ask your family doctor about adult referral options.
Qualified private professionals, such as psychologists, can diagnose autism. For the Ontario Autism Program, ontario.ca says the written diagnosis must include the child’s full name and date of birth, the assessment date, a statement that the child meets the diagnostic criteria for autism spectrum disorder, and the professional’s name and credentials.
CHEO’s diagnostic page does not describe language services, so ask. Say you want French when your doctor makes the referral, and ask what can be done in French at each step. With a private assessor, ask whether testing, the feedback meeting and the written report are all offered in French.
This page lists none. As of October 13, 2026, we did not find an official Ottawa autism assessment wait time on ontario.ca or CHEO’s pages. CHEO says each service in its Access Team has its own wait list. Ask CHEO or a private clinic for current timing in writing.
CHEO says it does not provide reassessments or second opinions for people who have already had an autism assessment or diagnosis. If you already have a report, CHEO asks you to tell them before your appointment. For other options, ask your doctor.
Use the public register of the College of Psychologists and Behaviour Analysts of Ontario, called Find a Member, on cpbao.ca. Search by last name. Doctors and nurse practitioners are listed by their own colleges. Ask the assessor for their full name and profession before you book.
Medical Disclaimer
This page provides general information about autism and related therapies for educational purposes only. It is not medical advice. Every child is unique—consult qualified healthcare professionals (pediatricians, developmental pediatricians, BCBAs) to determine appropriate interventions for your child's specific needs.
Find a local next step
- Autism assessment and diagnosis. Government of Ontario (2026)
Related guides
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Sources on this page
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Key claims are paired with their source, evidence tier, and verification date so readers can inspect the public record directly.
Facts6
Sources5
1 in 50
According to the 2019 Canadian Health Survey on Children and Youth, about 1 in 50 children and youth aged 1 to 17 in Canada had an autism diagnosis
WHO recommends accessible, community-based early interventions for children with autism. Timely evidence-based psychosocial interventions improve communication and social engagement
91,974
children are registered in the Ontario Autism Program
22.5%
Only 20,711 children have active funding agreements (22.5%), less than one in four
$965M
Ontario allocated $965M to the Ontario Autism Program in 2026-27
Last system verification: 2026-08-10. Next scheduled update: 2026-11-05.
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