Who Can Diagnose Autism in Australia?

How autism is diagnosed in Australia

The National Guideline for the assessment and diagnosis of autism in Australia launched in 2018, and its second edition (2023) has 66 recommendations approved by the NHMRC on 8 December 2023 for five years (Autism CRC).

1. 1Get a referral. Talk to your GP, paediatrician or child health professional about what you have noticed and ask for a referral to an assessment service.
2. 2Complete a Comprehensive Needs Assessment. This looks at functioning and includes a medical evaluation, so the team understands strengths, challenges and health.
3. 3Have a Diagnostic Evaluation if autism is suggested. A qualified clinician or team looks at whether the person meets the criteria for autism.
4. 4Discuss the findings. The team talks through what it found with you, and you can ask for a written report.
5. 5Get referred for support. The process finishes with referral for support (Autism CRC summary).

Who can diagnose autism in Australia: medical practitioners and psychologists

The 2023 Guideline sets training expectations for the clinician who leads a Diagnostic Evaluation (National Guideline).

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Can a psychologist diagnose autism?

Yes, a psychologist can lead a Diagnostic Evaluation if they hold the right area of practice endorsement.

• The guideline names clinical psychology, clinical neuropsychology and educational or developmental psychology as the relevant endorsements.
• Can a clinical psychologist diagnose autism? Yes, clinical psychology is one of the endorsements listed, so ask about their experience with autism assessments.
• Can a psychologist diagnose autism in adults? Ask whether they assess adults and what experience they have.
• Ask what the assessment includes, how long it takes, what it costs and how long the wait is before you book.

Can a paediatrician or psychiatrist diagnose autism?

Paediatricians, psychiatrists and neurologists with the right registration can lead a diagnosis.

• Can a paediatrician diagnose autism? Yes, one with specialist registration in community child health or general paediatrics can lead a Diagnostic Evaluation.
• Can a psychiatrist diagnose autism? Yes, one with specialist registration in psychiatry can.
• A neurologist with specialist registration in neurology can also lead.
• Medicare item 135 covers a paediatrician attendance of at least 45 minutes where a complex neurodevelopmental disorder such as autism is diagnosed and a treatment plan developed, for patients under 25, once per lifetime; the schedule fee is $320.55 (updated 1 July 2026) (MBS Online).
• Medicare rebates and any out-of-pocket costs vary, so ask the clinic for a written fee estimate before you start.

GP autism assessment: can a GP diagnose autism?

A GP plays an important role even when someone else leads the diagnosis.

• Your GP can listen to your concerns, check your general health and write a referral to a paediatrician, psychiatrist or psychologist.
• The guideline also lets a medical practitioner with general registration and at least six years of relevant experience lead a Diagnostic Evaluation, so ask your GP whether this applies to them.
• Not every GP offers autism assessments, so ask directly whether your practice does and how they follow the National Guideline.
• Bring examples of what you or your child find hard and easy, with school reports and any earlier assessments.
• Ask your GP about other referrals if anxiety or other needs sit alongside autism.

Can a speech pathologist diagnose autism?

Under the guideline, a speech pathologist takes part as a member of the assessment team.

• Speech pathologists and occupational therapists can join a Consensus Team evaluation, as noted in the 2023 National Guideline.
• Their reports on communication, sensory needs and daily skills can strengthen the full picture.
• They can also help with supports after diagnosis, such as communication strategies and daily living skills.
• Check with the service whether the final diagnosis will come from a medical practitioner or psychologist on the team.

Who can diagnose autism in adults in Australia?

Adults use the same guideline, but services and waiting times can differ from children’s services.

• The same guideline requirements apply to the clinician who leads, and a GP can refer you.
• Expect questions about your childhood, work, relationships and sensory experiences, and consider asking a family member to help with early history.
• Our guide to late autism diagnosis in adults explains what it can mean for you.
• If you are not sure where to start, call Autism Connect on 1300 308 699, a free national helpline run by Amaze, open 8am to 7pm Monday to Friday and funded by the Australian Government Department of Health, Disability and Ageing (Amaze).

How early can a child be diagnosed with autism?

Children can be assessed in early childhood, and early concerns are worth raising without waiting.

• Talk to your GP, child health nurse or paediatrician as soon as you notice differences in communication, play or sensory responses.
• Screening tools and online tests are for reflection only, and our guides to autism screening and autism tests in Australia explain them.
• If a child is also being looked at for attention differences, read about the ADHD and autism assessment and who can diagnose ADHD.
• Some families also look at autism assessment by telehealth where a service follows the guideline.
• Ask your GP or child health nurse what support is available while you wait.

Autism diagnosis and the NDIS

A diagnostic report can be useful evidence if you apply for the NDIS.

• If you meet the NDIS access requirements, your plan may include supports that are reasonable and necessary for your disability-related needs.
• Keep copies of your diagnostic report, therapy reports and any recommendations from the assessment team.
• Read our guide to autism funding under the NDIS for what to include in an access request.
• Autism is also called autism spectrum disorder (ASD), so the same professionals answer the question of who can diagnose ASD in Australia.

When to talk to a GP or specialist

You do not need certainty before you ask for advice.

• You or your child find communication, social situations or sensory experiences hard in a way that affects daily life.
• A teacher, childcare worker, employer or family member has raised the same concerns more than once.
• You have taken an online quiz and want a proper assessment, since only a qualified professional can assess this.
• There has been a sudden change in behaviour, sleep, eating or mood, which can have many causes.
• You are unsure which professional to see and want help choosing, or you want an assessment as an adult.

Call 000 in an emergency.

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Your next step

Book a GP appointment, write down what you have noticed and ask for a referral that follows the National Guideline. While you wait, TQN Care’s NDIS services offer practical support at home and in the community across Sydney, Melbourne and surrounding areas (NSW & VIC), and we are happy to talk about what could help your family. Diagnosis and treatment decisions always stay with your health professionals.