How autism is diagnosed

How the diagnostic assessment works

A paediatrician, psychiatrist or registered psychologist completes an assessment by examining your child's:

• Medical and developmental history
• Behaviours, social interactions and communication strategies

During the assessment, the specialist will interact with your child and observe how they complete a structured play-based assessment and cognitive, or thinking skill tests. The specialist will also ask you questions about your child’s behaviour and development.

After the assessment, you will meet with the specialist and receive a written report. The entire process takes more than one appointment to complete. At least one parent or guardian needs to be at the assessment. You can bring along another family member or friend for support.

Scheduling a diagnostic assessment

British Columbia Autism Assessment Network (BCAAN) provides free diagnostic assessments for children up to age 19. Lookup public assessment wait times.

• Get a referral from your doctor
• BCAAN will coordinate an assessment as close to where you live as possible
• After the assessment, BCAAN will send you a Clinical Outcomes Form with test results

A qualified B.C. specialist in private practice can also provide assessment and diagnosis as long as it follows B.C. standards and guidelines for assessments (PDF) and meets Autism Funding eligibility, which requires completion of the Autism Diagnostic Observation Schedule (ADOS-2) and Autism Diagnostic Interview – Revised (ADI-R) to be completed. Other assessments will not meet eligibility for Autism Funding. Parents need to pay for these assessments. This option might take less time.

• Make an appointment with a qualified B.C specialist
  • Pediatrician
  • Psychiatrist
  • Registered Psychologist
• Bring the Non-BCAAN (Private) Diagnosis of Autism Spectrum Disorder (PDF) form with you to your scheduled appointment

Note for qualified B.C. specialists:

• To meet eligibility requirements for Autism Funding, a private autism diagnosis requires completion of both ADOS-2 and ADI-R by a qualified BC specialist (other assessments will not meet eligibility for Autism Funding).
• Completing the Non-BCAAN form clearly and thoroughly helps the ministry process autism applications efficiently.

Note: As of October 8th, 2025, the MCFD policy requirement that Under-Six Non-BCAAN Autism Funding applications include a pediatrician report is temporarily suspended, province-wide. Recent challenges accessing pediatricians to complete medical work ups for Autism Funding applications have delayed access to funding that supports important early intervention services. Families with an Under-Six Non-BCAAN application without a pediatrician’s report can be submitted to Autism Funding for eligibility determination. Other Under-Six Non-BCAAN application policy criteria remain in effect (e.g., speech-therapy report, psychological report). Practitioners can continue using the current Non-BCAAN form until updates are made, while leaving the Section 3 Pediatrician's Report part blank or crossed out, and submit as usual.

Assessments completed outside of B.C. must be confirmed by a qualified B.C. specialist before you can apply for autism funding. 

• Make an appointment with a qualified B.C specialist
  • Pediatrician
  • Psychiatrist
  • Registered Psychologist
• Bring the Confirmation of Previous Diagnosis of Autism Spectrum Disorder (PDF) form with you to your scheduled appointment

If the assessment does not meet B.C. standards, you may need to have a new diagnostic assessment done in B.C. before applying for autism funding. The qualified BC specialist needs to be trained to assess autism, must observe the child, and attest that the diagnosis meets the DSM-5 criteria.

Note for qualified B.C. specialists: Completing the Confirmation of Previous Diagnosis form clearly and thoroughly helps the ministry process autism applications efficiently. 

Frequently Asked Questions for Qualified Professionals

Frequently Asked Questions for Qualified Professionals – Autism Assessments

If your child receives an autism diagnosis

After receiving your child's autism diagnosis, an assessment may indicate that your child needs support with skill development. You can:

• Build a support team that's tailored to your child's needs – it might include health professionals, therapists, care providers, educators and support workers
• Apply for autism funding to help cover the cost of support that will help them reach their development goals