How much does an autism diagnosis cost in Ontario?

In Ontario, autism diagnosis costs range from free (OHIP-covered) to $2,500-$4,000 for private assessments. Public assessments at hospitals like SickKids, Holland Bloorview, and CHEO are covered by OHIP but have wait times of 18-24 months. Private assessments through registered psychologists or clinics cost $2,500-$4,000 for children and $3,000-$5,000 for adults, with shorter wait times of 3-8 weeks. Both public and private assessments are accepted for OAP funding eligibility if conducted by qualified professionals.

Is autism assessment covered by OHIP in Ontario?

Yes, autism assessments are covered by OHIP in Ontario when conducted at publicly-funded hospitals and assessment centers. Major OHIP-covered locations include Holland Bloorview Kids Rehabilitation Hospital, SickKids Hospital, and Surrey Place Centre in Toronto; CHEO in Ottawa; and similar children's hospitals across Ontario. However, wait times for OHIP-covered assessments are 18-24 months. To access OHIP-covered assessment, you need a referral from your family doctor or pediatrician. The assessment must be conducted by a qualified medical professional (developmental pediatrician, pediatrician, psychiatrist) or registered psychologist at an approved facility.

How much is a private autism assessment in Ontario?

Private autism assessments in Ontario typically cost $2,500-$4,000 for children and $3,000-$5,000 for adults. Children's assessments are usually less expensive because they can be completed more quickly. Adult assessments require more extensive evaluation and often cost more. Wait times for private assessments are typically 3-8 weeks compared to 18-24 months for public assessments. Private assessments must be conducted by a registered psychologist or psychological associate to be accepted for OAP funding. Some private clinics offer payment plans or sliding scale fees based on income. Major cities like Toronto, Ottawa, Hamilton, and London have multiple private assessment options.

How long is the wait for autism diagnosis in Ontario?

Wait times for autism diagnosis in Ontario vary significantly between public and private assessment. Public (OHIP-covered) assessments have wait times of 18-24 months at major centers like SickKids, Holland Bloorview, CHEO, and Surrey Place. Some regional centers may have shorter waits of 12-18 months, while urban centers face longer waits. Private assessments have much shorter wait times of 3-8 weeks, though costs range from $2,500-$5,000. The wait time clock starts when your referral is received, not when you call to make the appointment. With over 70,000 children waiting for autism services in Ontario, early referral is critical, especially for children ages 2-6 when early intervention is most effective.

Does an autism diagnosis qualify you for OAP funding?

Yes, an official autism diagnosis is required to qualify for the Ontario Autism Program (OAP) funding. The diagnosis must be made by a qualified professional: registered psychologist, psychological associate, developmental pediatrician, pediatrician, child psychiatrist, or psychiatrist. The diagnosis document must specify Autism Spectrum Disorder or ASD (or previous terminology like Autistic Disorder, PDD-NOS, or Asperger's Syndrome). Both public (OHIP) and private assessments are accepted for OAP eligibility if conducted by qualified professionals. Once you have the diagnosis, you must register with AccessOAP by calling 1-833-425-2445 or visiting AccessOAP.ca. After registering, you will be placed on a waitlist for OAP funding, which currently has additional wait times of 5+ years for core clinical services funding. Register immediately after receiving your diagnosis to secure your place in line.

What is included in an autism assessment?

A comprehensive autism assessment in Ontario typically includes: clinical interviews with parents/caregivers about developmental history and current concerns; direct observation and interaction with the individual (for children, this includes play-based assessment); standardized assessment tools like ADOS-2 (Autism Diagnostic Observation Schedule) and ADI-R (Autism Diagnostic Interview-Revised); cognitive/developmental testing to assess IQ and developmental level; adaptive behavior assessment to evaluate daily living skills; review of school records, previous assessments, and medical records; feedback session to discuss findings; and a detailed written report with diagnosis and recommendations. The entire process typically takes 6-10 hours spread over 2-3 sessions for children, and 4-8 hours for adults. Private assessments may offer more comprehensive reports and faster turnaround times.

How much does an adult autism diagnosis cost in Ontario?

Adult autism diagnosis in Ontario typically costs $3,000-$5,000 for private assessments, compared to $2,500-$4,000 for children. Adults pay more because assessments often take longer and require more specialized expertise. OHIP-covered adult assessments are available but wait times are often 24+ months, and fewer providers offer adult assessments compared to children. Many hospitals that assess children do not assess adults. Adult assessments may be available through some hospitals with developmental programs, or through CAMH (Centre for Addiction and Mental Health) in Toronto for adults with co-occurring mental health conditions. Private psychologists specializing in adult autism assessment are available in major cities. An adult diagnosis can unlock workplace accommodations, supports in post-secondary education, and understanding of lifelong challenges, though adults do not qualify for OAP funding (OAP serves children under 18).

Should I pay for private autism assessment or wait for OHIP?

The decision between private and OHIP autism assessment involves several factors. Key considerations: your child's age (early intervention ages 2-6 is critical, so waiting may mean missing the optimal window); your financial capacity (can you afford $2,500-$4,000?); your urgency for accessing OAP funding (private assessment gets you registered for OAP 15-21 months sooner); and current wait times in your area. For children under 6, many families choose private assessment to access early intervention during the critical developmental window. However, this creates a two-tier system where only families with financial means can access timely diagnosis. Some private psychologists offer payment plans to help. If waiting for OHIP, submit your referral immediately and explore interim supports through schools and community resources while waiting. This is a personal decision based on your family's circumstances, resources, and urgency.

Where can I get an autism diagnosis in Toronto?

In Toronto, OHIP-covered autism assessments are available at Holland Bloorview Kids Rehabilitation Hospital (150 Kilgour Road), SickKids Hospital (555 University Avenue), and Surrey Place Centre (2 Surrey Place). These public assessments are free but have 18-24 month wait times and require a doctor's referral. Private assessment options in Toronto cost $2,500-$4,000 and have 3-8 week wait times. Toronto has the most private assessment options in Ontario, with multiple psychologists and clinics offering autism diagnostic services. When choosing a private assessor in Toronto, verify they are a registered psychologist or psychological association member, confirm they use gold-standard tools (ADOS-2, ADI-R), ask about wait times and total costs, and ensure they provide a detailed report suitable for OAP funding. Many Toronto families choose private assessment to access OAP funding sooner despite the cost.

Where can I get an autism diagnosis in Ottawa?

In Ottawa, CHEO (Children's Hospital of Eastern Ontario) at 401 Smyth Road provides OHIP-covered autism assessments with wait times of 18-24 months. CHEO offers bilingual (English/French) assessment services. A referral from your family doctor or pediatrician is required. Private assessments in Ottawa cost $2,500-$4,000 with wait times of 4-8 weeks. Ottawa has fewer private assessors than Toronto but still has several qualified psychologists and clinics. Bilingual private assessment options are available. Ottawa Children's Treatment Centre (395 Smyth Road) provides some assessment services and therapy. For families in Eastern Ontario outside Ottawa, CHEO serves as the primary pediatric assessment center. Many Ottawa-area families opt for private assessment to avoid the 18-24 month CHEO wait, especially for young children where early intervention is critical. When selecting a private assessor in Ottawa, confirm they can provide the detailed diagnostic report required for OAP registration.

What benefits does an autism diagnosis unlock in Ontario?

In Ontario, an autism diagnosis unlocks several important benefits and supports. For children: eligibility for the Ontario Autism Program (OAP) funding ($5,000-$20,000/year depending on age); Individual Education Plan (IEP) and special education support in school; accommodations and support through school boards; access to SSAH (Special Services at Home) funding for respite; and eligibility for DTC (Disability Tax Credit) which opens RDSP and Child Disability Benefit. For adults: workplace accommodations under Ontario Human Rights Code; supports in post-secondary education; understanding of lifelong challenges and access to appropriate mental health services; and Disability Tax Credit eligibility. The diagnosis provides documentation needed to advocate for accommodations and services in education, employment, and healthcare. For children, early diagnosis during the 2-6 year window is particularly valuable for accessing early intervention services during peak neurodevelopmental plasticity.

How do I get referred for autism assessment in Ontario?

To get referred for autism assessment in Ontario, start by discussing your concerns with your family doctor or pediatrician. Request a referral to an autism assessment center. For children, ask for referral to your local hospital's autism assessment program (e.g., Holland Bloorview, SickKids, CHEO) or a developmental pediatrician. For adults, request referral to a psychiatrist or psychologist who specializes in adult autism assessment. Be specific about your concerns and why you suspect autism. Bring a list of observed behaviors and symptoms. If your doctor is unfamiliar with autism assessment, consider requesting a referral to a developmental pediatrician (for children) or seeking a second opinion. For private assessment, you can contact psychologists or clinics directly without a referral, though they may still require a doctor's referral for insurance purposes. After submitting your referral to a public assessment center, call to confirm receipt and ask about expected wait times. While waiting, gather relevant information including school reports, previous assessments, and developmental history.

What is ADOS-2 and is it necessary for autism diagnosis?

The ADOS-2 (Autism Diagnostic Observation Schedule, Second Edition) is considered the gold standard tool for autism diagnosis. It is a semi-structured assessment that involves direct observation of social interaction, communication, play, and imaginative use of materials. The ADOS-2 is administered by trained clinicians and takes 30-60 minutes to complete. While not absolutely required for diagnosis, most comprehensive autism assessments in Ontario include the ADOS-2 because it provides objective, standardized evidence of autism traits. The ADOS-2 is often combined with the ADI-R (Autism Diagnostic Interview-Revised), which is a detailed parent interview about developmental history. Together, these tools provide strong diagnostic evidence. Most OAP-eligible assessments include ADOS-2 or similar standardized tools. When choosing a private assessor, confirm they use ADOS-2 or equivalent gold-standard tools to ensure your assessment meets OAP requirements and professional standards.

Can I get autism diagnosis for free in Ontario without waiting?

Unfortunately, there is no way to get a comprehensive autism diagnosis for free in Ontario without waiting. The trade-off in Ontario's system is: OHIP-covered assessments are free but have 18-24 month wait times; private assessments are fast (3-8 weeks) but cost $2,500-$5,000. Some options to explore: some universities may offer lower-cost assessments through their psychology training programs (e.g., University of Toronto, York University) though wait times can still be long and quality varies; some employers' extended health benefits may cover a portion of psychological assessment costs (check your policy); and flexible spending accounts or health spending accounts may be used. Some private psychologists offer sliding scale fees based on income or payment plans to make costs more manageable. However, the fundamental reality remains: quick access requires paying out-of-pocket, creating a two-tier system where only families with financial means can access timely diagnosis and subsequent OAP funding.

How much does an autism diagnosis cost in Ontario?

In Ontario, autism diagnosis costs range from free (OHIP-covered) to $2,500-$4,000 for private assessments. Public assessments at hospitals like SickKids, Holland Bloorview, and CHEO are covered by OHIP but have wait times of 18-24 months. Private assessments through registered psychologists or clinics cost $2,500-$4,000 for children and $3,000-$5,000 for adults, with shorter wait times of 3-8 weeks. Both public and private assessments are accepted for OAP funding eligibility if conducted by qualified professionals.

Is autism assessment covered by OHIP in Ontario?

Yes, autism assessments are covered by OHIP in Ontario when conducted at publicly-funded hospitals and assessment centers. Major OHIP-covered locations include Holland Bloorview Kids Rehabilitation Hospital, SickKids Hospital, and Surrey Place Centre in Toronto; CHEO in Ottawa; and similar children's hospitals across Ontario. However, wait times for OHIP-covered assessments are 18-24 months. To access OHIP-covered assessment, you need a referral from your family doctor or pediatrician. The assessment must be conducted by a qualified medical professional (developmental pediatrician, pediatrician, psychiatrist) or registered psychologist at an approved facility.

How much is a private autism assessment in Ontario?

Private autism assessments in Ontario typically cost $2,500-$4,000 for children and $3,000-$5,000 for adults. Children's assessments are usually less expensive because they can be completed more quickly. Adult assessments require more extensive evaluation and often cost more. Wait times for private assessments are typically 3-8 weeks compared to 18-24 months for public assessments. Private assessments must be conducted by a registered psychologist or psychological associate to be accepted for OAP funding. Some private clinics offer payment plans or sliding scale fees based on income. Major cities like Toronto, Ottawa, Hamilton, and London have multiple private assessment options.

How long is the wait for autism diagnosis in Ontario?

Wait times for autism diagnosis in Ontario vary significantly between public and private assessment. Public (OHIP-covered) assessments have wait times of 18-24 months at major centers like SickKids, Holland Bloorview, CHEO, and Surrey Place. Some regional centers may have shorter waits of 12-18 months, while urban centers face longer waits. Private assessments have much shorter wait times of 3-8 weeks, though costs range from $2,500-$5,000. The wait time clock starts when your referral is received, not when you call to make the appointment. With over 70,000 children waiting for autism services in Ontario, early referral is critical, especially for children ages 2-6 when early intervention is most effective.

Does an autism diagnosis qualify you for OAP funding?

Yes, an official autism diagnosis is required to qualify for the Ontario Autism Program (OAP) funding. The diagnosis must be made by a qualified professional: registered psychologist, psychological associate, developmental pediatrician, pediatrician, child psychiatrist, or psychiatrist. The diagnosis document must specify Autism Spectrum Disorder or ASD (or previous terminology like Autistic Disorder, PDD-NOS, or Asperger's Syndrome). Both public (OHIP) and private assessments are accepted for OAP eligibility if conducted by qualified professionals. Once you have the diagnosis, you must register with AccessOAP by calling 1-833-425-2445 or visiting AccessOAP.ca. After registering, you will be placed on a waitlist for OAP funding, which currently has additional wait times of 5+ years for core clinical services funding. Register immediately after receiving your diagnosis to secure your place in line.

What is included in an autism assessment?

A comprehensive autism assessment in Ontario typically includes: clinical interviews with parents/caregivers about developmental history and current concerns; direct observation and interaction with the individual (for children, this includes play-based assessment); standardized assessment tools like ADOS-2 (Autism Diagnostic Observation Schedule) and ADI-R (Autism Diagnostic Interview-Revised); cognitive/developmental testing to assess IQ and developmental level; adaptive behavior assessment to evaluate daily living skills; review of school records, previous assessments, and medical records; feedback session to discuss findings; and a detailed written report with diagnosis and recommendations. The entire process typically takes 6-10 hours spread over 2-3 sessions for children, and 4-8 hours for adults. Private assessments may offer more comprehensive reports and faster turnaround times.

How much does an adult autism diagnosis cost in Ontario?

Adult autism diagnosis in Ontario typically costs $3,000-$5,000 for private assessments, compared to $2,500-$4,000 for children. Adults pay more because assessments often take longer and require more specialized expertise. OHIP-covered adult assessments are available but wait times are often 24+ months, and fewer providers offer adult assessments compared to children. Many hospitals that assess children do not assess adults. Adult assessments may be available through some hospitals with developmental programs, or through CAMH (Centre for Addiction and Mental Health) in Toronto for adults with co-occurring mental health conditions. Private psychologists specializing in adult autism assessment are available in major cities. An adult diagnosis can unlock workplace accommodations, supports in post-secondary education, and understanding of lifelong challenges, though adults do not qualify for OAP funding (OAP serves children under 18).

Should I pay for private autism assessment or wait for OHIP?

The decision between private and OHIP autism assessment involves several factors. Key considerations: your child's age (early intervention ages 2-6 is critical, so waiting may mean missing the optimal window); your financial capacity (can you afford $2,500-$4,000?); your urgency for accessing OAP funding (private assessment gets you registered for OAP 15-21 months sooner); and current wait times in your area. For children under 6, many families choose private assessment to access early intervention during the critical developmental window. However, this creates a two-tier system where only families with financial means can access timely diagnosis. Some private psychologists offer payment plans to help. If waiting for OHIP, submit your referral immediately and explore interim supports through schools and community resources while waiting. This is a personal decision based on your family's circumstances, resources, and urgency.

Where can I get an autism diagnosis in Toronto?

In Toronto, OHIP-covered autism assessments are available at Holland Bloorview Kids Rehabilitation Hospital (150 Kilgour Road), SickKids Hospital (555 University Avenue), and Surrey Place Centre (2 Surrey Place). These public assessments are free but have 18-24 month wait times and require a doctor's referral. Private assessment options in Toronto cost $2,500-$4,000 and have 3-8 week wait times. Toronto has the most private assessment options in Ontario, with multiple psychologists and clinics offering autism diagnostic services. When choosing a private assessor in Toronto, verify they are a registered psychologist or psychological association member, confirm they use gold-standard tools (ADOS-2, ADI-R), ask about wait times and total costs, and ensure they provide a detailed report suitable for OAP funding. Many Toronto families choose private assessment to access OAP funding sooner despite the cost.

Where can I get an autism diagnosis in Ottawa?

In Ottawa, CHEO (Children's Hospital of Eastern Ontario) at 401 Smyth Road provides OHIP-covered autism assessments with wait times of 18-24 months. CHEO offers bilingual (English/French) assessment services. A referral from your family doctor or pediatrician is required. Private assessments in Ottawa cost $2,500-$4,000 with wait times of 4-8 weeks. Ottawa has fewer private assessors than Toronto but still has several qualified psychologists and clinics. Bilingual private assessment options are available. Ottawa Children's Treatment Centre (395 Smyth Road) provides some assessment services and therapy. For families in Eastern Ontario outside Ottawa, CHEO serves as the primary pediatric assessment center. Many Ottawa-area families opt for private assessment to avoid the 18-24 month CHEO wait, especially for young children where early intervention is critical. When selecting a private assessor in Ottawa, confirm they can provide the detailed diagnostic report required for OAP registration.

What benefits does an autism diagnosis unlock in Ontario?

In Ontario, an autism diagnosis unlocks several important benefits and supports. For children: eligibility for the Ontario Autism Program (OAP) funding ($5,000-$20,000/year depending on age); Individual Education Plan (IEP) and special education support in school; accommodations and support through school boards; access to SSAH (Special Services at Home) funding for respite; and eligibility for DTC (Disability Tax Credit) which opens RDSP and Child Disability Benefit. For adults: workplace accommodations under Ontario Human Rights Code; supports in post-secondary education; understanding of lifelong challenges and access to appropriate mental health services; and Disability Tax Credit eligibility. The diagnosis provides documentation needed to advocate for accommodations and services in education, employment, and healthcare. For children, early diagnosis during the 2-6 year window is particularly valuable for accessing early intervention services during peak neurodevelopmental plasticity.

How do I get referred for autism assessment in Ontario?

To get referred for autism assessment in Ontario, start by discussing your concerns with your family doctor or pediatrician. Request a referral to an autism assessment center. For children, ask for referral to your local hospital's autism assessment program (e.g., Holland Bloorview, SickKids, CHEO) or a developmental pediatrician. For adults, request referral to a psychiatrist or psychologist who specializes in adult autism assessment. Be specific about your concerns and why you suspect autism. Bring a list of observed behaviors and symptoms. If your doctor is unfamiliar with autism assessment, consider requesting a referral to a developmental pediatrician (for children) or seeking a second opinion. For private assessment, you can contact psychologists or clinics directly without a referral, though they may still require a doctor's referral for insurance purposes. After submitting your referral to a public assessment center, call to confirm receipt and ask about expected wait times. While waiting, gather relevant information including school reports, previous assessments, and developmental history.

What is ADOS-2 and is it necessary for autism diagnosis?

The ADOS-2 (Autism Diagnostic Observation Schedule, Second Edition) is considered the gold standard tool for autism diagnosis. It is a semi-structured assessment that involves direct observation of social interaction, communication, play, and imaginative use of materials. The ADOS-2 is administered by trained clinicians and takes 30-60 minutes to complete. While not absolutely required for diagnosis, most comprehensive autism assessments in Ontario include the ADOS-2 because it provides objective, standardized evidence of autism traits. The ADOS-2 is often combined with the ADI-R (Autism Diagnostic Interview-Revised), which is a detailed parent interview about developmental history. Together, these tools provide strong diagnostic evidence. Most OAP-eligible assessments include ADOS-2 or similar standardized tools. When choosing a private assessor, confirm they use ADOS-2 or equivalent gold-standard tools to ensure your assessment meets OAP requirements and professional standards.

Can I get autism diagnosis for free in Ontario without waiting?

Unfortunately, there is no way to get a comprehensive autism diagnosis for free in Ontario without waiting. The trade-off in Ontario's system is: OHIP-covered assessments are free but have 18-24 month wait times; private assessments are fast (3-8 weeks) but cost $2,500-$5,000. Some options to explore: some universities may offer lower-cost assessments through their psychology training programs (e.g., University of Toronto, York University) though wait times can still be long and quality varies; some employers' extended health benefits may cover a portion of psychological assessment costs (check your policy); and flexible spending accounts or health spending accounts may be used. Some private psychologists offer sliding scale fees based on income or payment plans to make costs more manageable. However, the fundamental reality remains: quick access requires paying out-of-pocket, creating a two-tier system where only families with financial means can access timely diagnosis and subsequent OAP funding.

End the Wait Ontario

How much does ABA therapy cost in Ontario?

ABA therapy in Ontario costs $50-$150 per hour depending on provider credentials. Monthly costs for intensive programs (20-40 hours/week) range from $4,000 to $24,000. OAP funding covers a portion, but families typically face significant out-of-pocket expenses during the critical early intervention window.

End The Wait Ontario Research

COST GUIDE 2025

Autism Diagnosis Cost in Ontario

We know the system is overwhelming. Here is the honest breakdown of costs, wait times, and how to finally get answers for your child. Compare private ($2,500-$4,000) vs OHIP (18-24 month wait) options.

Last updated: January 2025

$2,500-$4,000

Private Assessment Cost

18-24 Months

OHIP Wait Time

3-8 Weeks

Private Wait Time

SYSTEM OVERVIEW

How Ontario's Autism System Works

The Ontario Autism Program (OAP) is designed to provide funding for therapy, but understanding the eligibility and wait times is critical.

Program Summary

The Ontario Autism Program (OAP) provides funding to families of children and youth on the autism spectrum. Families must register with AccessOAP to enter the system. Once registered, children are placed on a waitlist for "Core Clinical Services" funding.

Age-Based Funding

Eligible families receive funding based on the child's age: $22,000/year (ages 0-5) or $5,500/year (ages 6-17).

Wait Times

Current wait times for Core Clinical Services funding are estimated at 5-7 years for new registrants.

Diagnosis Required

A written diagnosis from a qualified professional is mandatory to register.

$80k+

Avg. Annual Therapy Cost

For comprehensive IBI/ABA therapy

70,000+

Children Waiting

More children waiting than supported

5+ Years

Wait for Funding

Most children will age out of their most critical developmental window before receiving significant funding.

Who is Eligible?

Under age 18

Living in Ontario

Written Diagnosis

Full OAP Funding Guide

Private vs OHIP Assessment Comparison

Factor	OHIP/Public Assessment	Private Assessment
Cost	Free (OHIP covered)	$2,500-$4,000 (child), $3,000-$5,000 (adult)
Wait Time	18-24 months	3-8 weeks
Assessment Tools	ADOS-2, ADI-R, cognitive testing	ADOS-2, ADI-R, cognitive testing
OAP Eligible	Yes	Yes (if qualified assessor)
Report Detail	Comprehensive	Often more detailed
Referral Required	Yes (doctor)	Sometimes (depends on clinic)

Choose OHIP/Public If:

•You cannot afford private assessment costs
•Your child is over 6 (less time-sensitive)
•You're willing to wait 18-24 months
•You can access interim supports (school, community)
•You have a doctor who can make referral

Consider Private If:

•Your child is 2-6 (early intervention critical)
•You can afford $2,500-$4,000 or have payment options
•You want to register for OAP funding 15+ months sooner
•You need diagnosis for school accommodations urgently
•You want faster answers and peace of mind

Child vs Adult Assessment Costs

Child Assessment (Ages 0-17)

Private Cost Range$2,500-$4,000

Typical cost for comprehensive assessment

What's Included:

• Developmental history interview with parents
• ADOS-2 observation and assessment
• Cognitive/developmental testing
• Adaptive behavior assessment
• School records review (with permission)
• Feedback session with parents
• Detailed written report for OAP

OAP Eligible: Children with diagnosis qualify for Ontario Autism Program funding ($5,000-$20,000/year depending on age).

Adult Assessment (Ages 18+)

Private Cost Range$3,000-$5,000

Typically more than child assessments

What's Included:

• Clinical interview about childhood and current symptoms
• ADOS-2 Module 4 (for adults)
• Cognitive testing
• Adaptive functioning assessment
• Screening for co-occurring conditions
• Feedback session
• Detailed written report

Note: Adults do not qualify for OAP funding, but diagnosis unlocks workplace accommodations, post-secondary supports, and DTC eligibility.

ASSESSMENT PROCESS

What's Included in an Autism Assessment

A comprehensive autism assessment in Ontario follows standardized protocols and includes multiple components to ensure diagnostic accuracy.

Clinical Interview

Detailed discussion of developmental history, current concerns, medical history, and family history. For children, this involves extensive parent interview.

Direct Observation

The assessor observes and interacts with the individual. For children, this is play-based. For adults, this involves structured conversation and social tasks.

Standardized Tools

Gold-standard assessments like ADOS-2 (Autism Diagnostic Observation Schedule) and ADI-R (Autism Diagnostic Interview-Revised) provide objective evidence.

Cognitive Testing

IQ or developmental testing to establish cognitive baseline and identify strengths and challenges. This helps differentiate autism from other conditions.

Adaptive Assessment

Evaluation of daily living skills, communication, and social functioning in everyday contexts. This helps determine support needs.

Report & Feedback

Comprehensive written report with diagnosis, recommendations, and feedback session to discuss findings and next steps.

Typical Time Investment

Child Assessment

6-10 hours total, spread over 2-3 sessions

Longer because it involves parent interview, child observation, and more extensive testing

Adult Assessment

4-8 hours total, spread over 1-3 sessions

May be slightly shorter but requires more specialized expertise

What a Diagnosis Unlocks

For Children

OAP Funding

$5,000-$20,000/year for autism therapy

School Accommodations

IEP, educational assistant, special education support

SSAH Funding

Respite and personal growth program funding

Disability Tax Credit

Opens RDSP and Child Disability Benefit

For Adults

Workplace Accommodations

Protected under Ontario Human Rights Code

Post-Secondary Supports

Accommodations at college/university

Disability Tax Credit

Tax credit and RDSP eligibility

Self-Understanding

Context for lifelong experiences and challenges

For Families

Access to Resources

Autism Ontario, community programs

Parent Training

Learn strategies to support your child

Community Connection

Connect with other autism families

Advocacy Tools

Documentation for schools, services

Find a Provider Near You

We have compiled comprehensive, city-specific guides to help you find trusted psychologists and understand local wait times.

Toronto & GTA

Most Options

Access the largest network of private psychologists and major hospitals like SickKids and Holland Bloorview.

Private Cost

$2,500+

Hospital Wait

24 mo+

Read Toronto Guide

Ottawa & East

Bilingual Services

Navigate CHEO wait times and connect with private clinics serving the National Capital Region.

Private Cost

$2,800+

CHEO Wait

18-24 mo

Read Ottawa Guide

Ottawa

Bilingual

Private Cost

$2,500-$4,000

OHIP Wait

18-24 months

Public Assessment Centers:

• CHEO (Children's Hospital of Eastern Ontario)
• Ottawa Children's Treatment Centre

Full Ottawa Guide

Hamilton

Private Cost

$2,500-$4,000

OHIP Wait

12-18 months

Public Assessment Centers:

• McMaster Children's Hospital
• Hamilton Health Sciences

Full Hamilton Guide

London

Private Cost

$2,500-$4,000

OHIP Wait

12-18 months

Public Assessment Centers:

• Children's Hospital (London Health Sciences Centre)
• Thames Valley Children's Centre

Full London Guide

How to Get Started

Frequently Asked Questions

Related Resources

Cost Calculator

Calculate therapy costs and compare with OAP funding

Try Calculator

OAP Funding Guide

Complete guide to accessing OAP funding after diagnosis

Read Guide

Regional Services

Find autism services in your city

Browse Regions

Join the Movement

Help us end the wait for Ontario families

Take Action

Need Help Navigating the System?

Understanding autism diagnosis costs and wait times is just the first step. Join us in advocating for a system that doesn't force families to choose between timely care and financial hardship.

Email Officials Now Share Your Story

This page is part of the Family Resources topic cluster. Support resources for families.

Verified References & Sources

[2024]

Ministry of Children, Community and Social Services: Spending Plan ReviewVerified

Financial Accountability Office of Ontario (FAO) • Report • 2024-02-29

View Source

[2021]

Autism Services: A Financial ReviewVerified

Financial Accountability Office of Ontario (FAO) • Report • 2021-06-01

View Source

[2023]

Autism Spectrum Disorders Fact SheetVerified

World Health Organization (WHO) • Official • 2023-11-15

View Source

[2024]

Ontario Autism Program: Interim one-time fundingVerified

Government of Ontario • Government • 2024-01-01

View Source

[2017]

Cost-Effectiveness of Applied Behavior Analysis for AutismVerified

Tritter et al. (JAMA Pediatrics) • Academic • 2017-05-01

[2014]

The Lifetime Costs of AutismVerified

Mandell et al. (JAMA Pediatrics) • Academic • 2014-06-09

[2025]

Ontario registry for autism program hits new record highVerified

Global News / Canadian Press • News • 2025-10-30

EndTheWaitOntario.com is committed to accuracy. Our data is independently verified against official government reports, scientific literature, and accessible public records.

End the Wait Ontario

How much does ABA therapy cost in Ontario?

End The Wait Ontario Research

COST GUIDE 2025

Autism Diagnosis Cost in Ontario

Last updated: January 2025

$2,500-$4,000

Private Assessment Cost

18-24 Months

OHIP Wait Time

3-8 Weeks

Private Wait Time

SYSTEM OVERVIEW

How Ontario's Autism System Works

The Ontario Autism Program (OAP) is designed to provide funding for therapy, but understanding the eligibility and wait times is critical.

Program Summary

Age-Based Funding

Eligible families receive funding based on the child's age: $22,000/year (ages 0-5) or $5,500/year (ages 6-17).

Wait Times

Current wait times for Core Clinical Services funding are estimated at 5-7 years for new registrants.

Diagnosis Required

A written diagnosis from a qualified professional is mandatory to register.

$80k+

Avg. Annual Therapy Cost

For comprehensive IBI/ABA therapy

70,000+

Children Waiting

More children waiting than supported

5+ Years

Wait for Funding

Most children will age out of their most critical developmental window before receiving significant funding.

Who is Eligible?

Under age 18

Living in Ontario

Written Diagnosis

Full OAP Funding Guide

Private vs OHIP Assessment Comparison

Factor	OHIP/Public Assessment	Private Assessment
Cost	Free (OHIP covered)	$2,500-$4,000 (child), $3,000-$5,000 (adult)
Wait Time	18-24 months	3-8 weeks
Assessment Tools	ADOS-2, ADI-R, cognitive testing	ADOS-2, ADI-R, cognitive testing
OAP Eligible	Yes	Yes (if qualified assessor)
Report Detail	Comprehensive	Often more detailed
Referral Required	Yes (doctor)	Sometimes (depends on clinic)

Choose OHIP/Public If:

•You cannot afford private assessment costs
•Your child is over 6 (less time-sensitive)
•You're willing to wait 18-24 months
•You can access interim supports (school, community)
•You have a doctor who can make referral

Consider Private If:

•Your child is 2-6 (early intervention critical)
•You can afford $2,500-$4,000 or have payment options
•You want to register for OAP funding 15+ months sooner
•You need diagnosis for school accommodations urgently
•You want faster answers and peace of mind

Child vs Adult Assessment Costs

Child Assessment (Ages 0-17)

Private Cost Range$2,500-$4,000

Typical cost for comprehensive assessment

What's Included:

• Developmental history interview with parents
• ADOS-2 observation and assessment
• Cognitive/developmental testing
• Adaptive behavior assessment
• School records review (with permission)
• Feedback session with parents
• Detailed written report for OAP

OAP Eligible: Children with diagnosis qualify for Ontario Autism Program funding ($5,000-$20,000/year depending on age).

Adult Assessment (Ages 18+)

Private Cost Range$3,000-$5,000

Typically more than child assessments

What's Included:

• Clinical interview about childhood and current symptoms
• ADOS-2 Module 4 (for adults)
• Cognitive testing
• Adaptive functioning assessment
• Screening for co-occurring conditions
• Feedback session
• Detailed written report

Note: Adults do not qualify for OAP funding, but diagnosis unlocks workplace accommodations, post-secondary supports, and DTC eligibility.

ASSESSMENT PROCESS

What's Included in an Autism Assessment

A comprehensive autism assessment in Ontario follows standardized protocols and includes multiple components to ensure diagnostic accuracy.

Clinical Interview

Detailed discussion of developmental history, current concerns, medical history, and family history. For children, this involves extensive parent interview.

Direct Observation

The assessor observes and interacts with the individual. For children, this is play-based. For adults, this involves structured conversation and social tasks.

Standardized Tools

Gold-standard assessments like ADOS-2 (Autism Diagnostic Observation Schedule) and ADI-R (Autism Diagnostic Interview-Revised) provide objective evidence.

Cognitive Testing

IQ or developmental testing to establish cognitive baseline and identify strengths and challenges. This helps differentiate autism from other conditions.

Adaptive Assessment

Evaluation of daily living skills, communication, and social functioning in everyday contexts. This helps determine support needs.

Report & Feedback

Comprehensive written report with diagnosis, recommendations, and feedback session to discuss findings and next steps.

Typical Time Investment

Child Assessment

6-10 hours total, spread over 2-3 sessions

Longer because it involves parent interview, child observation, and more extensive testing

Adult Assessment

4-8 hours total, spread over 1-3 sessions

May be slightly shorter but requires more specialized expertise

What a Diagnosis Unlocks

For Children

OAP Funding

$5,000-$20,000/year for autism therapy

School Accommodations

IEP, educational assistant, special education support

SSAH Funding

Respite and personal growth program funding

Disability Tax Credit

Opens RDSP and Child Disability Benefit

For Adults

Workplace Accommodations

Protected under Ontario Human Rights Code

Post-Secondary Supports

Accommodations at college/university

Disability Tax Credit

Tax credit and RDSP eligibility

Self-Understanding

Context for lifelong experiences and challenges

For Families

Access to Resources

Autism Ontario, community programs

Parent Training

Learn strategies to support your child

Community Connection

Connect with other autism families

Advocacy Tools

Documentation for schools, services

Find a Provider Near You

We have compiled comprehensive, city-specific guides to help you find trusted psychologists and understand local wait times.

Toronto & GTA

Most Options

Access the largest network of private psychologists and major hospitals like SickKids and Holland Bloorview.

Private Cost

$2,500+

Hospital Wait

24 mo+

Read Toronto Guide

Ottawa & East

Bilingual Services

Navigate CHEO wait times and connect with private clinics serving the National Capital Region.

Private Cost

$2,800+

CHEO Wait

18-24 mo

Read Ottawa Guide

Ottawa

Bilingual

Private Cost

$2,500-$4,000

OHIP Wait

18-24 months

Public Assessment Centers:

• CHEO (Children's Hospital of Eastern Ontario)
• Ottawa Children's Treatment Centre

Full Ottawa Guide

Hamilton

Private Cost

$2,500-$4,000

OHIP Wait

12-18 months

Public Assessment Centers:

• McMaster Children's Hospital
• Hamilton Health Sciences

Full Hamilton Guide

London

Private Cost

$2,500-$4,000

OHIP Wait

12-18 months

Public Assessment Centers:

• Children's Hospital (London Health Sciences Centre)
• Thames Valley Children's Centre

Full London Guide

How to Get Started

Frequently Asked Questions

Related Resources

Cost Calculator

Calculate therapy costs and compare with OAP funding

Try Calculator

OAP Funding Guide

Complete guide to accessing OAP funding after diagnosis

Read Guide

Regional Services

Find autism services in your city

Browse Regions

Join the Movement

Help us end the wait for Ontario families

Take Action

Need Help Navigating the System?

Understanding autism diagnosis costs and wait times is just the first step. Join us in advocating for a system that doesn't force families to choose between timely care and financial hardship.

Email Officials Now Share Your Story

This page is part of the Family Resources topic cluster. Support resources for families.

Verified References & Sources

[2024]

Ministry of Children, Community and Social Services: Spending Plan ReviewVerified

Financial Accountability Office of Ontario (FAO) • Report • 2024-02-29

View Source

[2021]

Autism Services: A Financial ReviewVerified

Financial Accountability Office of Ontario (FAO) • Report • 2021-06-01

View Source

[2023]

Autism Spectrum Disorders Fact SheetVerified

World Health Organization (WHO) • Official • 2023-11-15

View Source

[2024]

Ontario Autism Program: Interim one-time fundingVerified

Government of Ontario • Government • 2024-01-01

View Source

[2017]

Cost-Effectiveness of Applied Behavior Analysis for AutismVerified

Tritter et al. (JAMA Pediatrics) • Academic • 2017-05-01

[2014]

The Lifetime Costs of AutismVerified

Mandell et al. (JAMA Pediatrics) • Academic • 2014-06-09

[2025]

Ontario registry for autism program hits new record highVerified

Global News / Canadian Press • News • 2025-10-30

EndTheWaitOntario.com is committed to accuracy. Our data is independently verified against official government reports, scientific literature, and accessible public records.

End the Wait Ontario

How much does ABA therapy cost in Ontario?

Autism Diagnosis Cost in Ontario

How Ontario's Autism System Works

Program Summary

Age-Based Funding

Wait Times

Diagnosis Required

Who is Eligible?

Private vs OHIP Assessment Comparison

Choose OHIP/Public If:

Consider Private If:

Child vs Adult Assessment Costs

Child Assessment (Ages 0-17)

What's Included:

Adult Assessment (Ages 18+)

What's Included:

What's Included in an Autism Assessment

Clinical Interview

Direct Observation

Standardized Tools

Cognitive Testing

Adaptive Assessment

Report & Feedback

Typical Time Investment

Child Assessment

Adult Assessment

What a Diagnosis Unlocks

For Children

For Adults

For Families

Find a Provider Near You

Toronto & GTA

Ottawa & East

Ottawa

Hamilton

London

How to Get Started

1Discuss concerns with your doctor

2Get a referral for assessment

3Wait for assessment (or explore private)

4Complete the assessment

5Receive diagnosis and register for OAP

Frequently Asked Questions

How much does an autism diagnosis cost in Ontario?

Is autism assessment covered by OHIP?

How long is the wait for autism diagnosis in Ontario?

Does an autism diagnosis qualify you for OAP funding?

Should I pay for private assessment or wait for OHIP?

What is ADOS-2 and is it necessary for diagnosis?

How much does adult autism diagnosis cost?

Related Resources

Cost Calculator

OAP Funding Guide

Regional Services

Join the Movement

Need Help Navigating the System?

Related Topics

Verified References & Sources

How much does ABA therapy cost in Ontario?

Autism Diagnosis Cost in Ontario

How Ontario's Autism System Works

Program Summary

Age-Based Funding

Wait Times

Diagnosis Required

Who is Eligible?

Private vs OHIP Assessment Comparison

Choose OHIP/Public If:

Consider Private If:

Child vs Adult Assessment Costs

Child Assessment (Ages 0-17)

What's Included:

Adult Assessment (Ages 18+)

What's Included:

What's Included in an Autism Assessment

Clinical Interview

Direct Observation

Standardized Tools

Cognitive Testing

Adaptive Assessment