
Dr. Mimi XuChild & Adolescent Psychiatrist
MD, MMed(Psych), FRANZCP, Adv Cert Child Adol Psych
AHPRA: MED0001931439
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Dr. Mimi XuChild & Adolescent Psychiatrist
Specialist autism assessment for children, adolescents, and adults. Comprehensive psychiatric evaluation, NDIS-suitable reports, and ongoing support via secure telehealth across Australia.
Autism Spectrum Disorder (ASD) is a neurodevelopmental condition characterised by differences in social communication and interaction, alongside restricted, repetitive patterns of behaviour, interests, or activities. The word "spectrum" reflects the wide range of presentations — abilities and support needs vary substantially from person to person.
Current Australian estimates suggest about 1 in 70 people are autistic. Diagnosis rates have risen as understanding has improved, particularly for girls, women, and people without intellectual disability who were historically missed. Many adults are now seeking assessment after recognising themselves in a child or relative who has been diagnosed.
Autism is not an illness to be cured. The diagnostic process is about understanding how someone’s brain works, identifying genuine support needs, and accessing resources (including NDIS funding when eligible) that improve quality of life. Co-occurring conditions such as ADHD, anxiety, depression, sleep problems, or sensory processing difficulties are common and often respond to focused treatment.
Common Signs of Autism
Common ways Autism can present
Difficulty with the back-and-forth of conversation, reading non-verbal cues, understanding implied meaning, or adjusting communication style across contexts. Eye contact may feel uncomfortable or be used differently than typical.
Deep, focused interests in specific topics, repetitive movements (stimming), strong preference for routines, and distress when routines are disrupted. Special interests can be a significant strength as well as a clinical sign.
Heightened or reduced response to sounds, lights, textures, smells, tastes, or touch. Specific clothing, food textures, or noisy environments can be intolerable. Often a major driver of distress and behavioural challenges.
Many autistic girls and women learn to mimic typical social behaviour to fit in, exhausting themselves in the process. Often diagnosed only after burnout, mental health difficulties, or a child being diagnosed first. Internal struggle is significant despite outward appearance.
ADHD, anxiety, OCD, depression, sleep difficulties, eating differences, and learning disorders are common. The diagnostic question is often "autism plus what else?" rather than autism alone.
Many adults seek assessment after recognising themselves in a diagnosed child, after burnout in social or sensory-demanding jobs, or after years of feeling different without language for it. Adult diagnosis can be deeply validating and reframe a lifetime of experiences.
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Our free screening tools can help with that first step.
ADHD · Autism · Anxiety · Depression · PTSD
Take a Free ScreeningComprehensive autism assessment combines clinical interview (developmental history, current functioning), structured observation tools (such as ADOS-2 in clinic settings), parent or partner reports, and where useful, school or workplace input. The aim is a clear formulation: is this autism, what are the genuine support needs, and what else is going on?
Autism itself is not treated with medication. However, common co-occurring conditions are. ADHD medication, SSRIs for anxiety or depression, sleep interventions, and behavioural support all play a role when relevant. We do not pathologise autistic traits; we treat the things that are causing distress or impairment.
Support recommendations depend on age and need. For children, this might include speech and language therapy, occupational therapy, parent training, school accommodations, and where eligible, NDIS support. For adolescents and adults, work or study accommodations, sensory-informed lifestyle changes, and treatment of co-occurring mental health conditions are often the highest-yield supports.
Our Specialist Psychiatrists
Experienced clinicians providing assessment and treatment for Autism


How to Get Started
Simple steps to access specialist care
Complete our free, validated screening tools for some initial answers.
Request a Mental Health Treatment Plan referral from your GP.
Choose a convenient time for your telehealth consultation.
Meet with your psychiatrist via secure video from home.
Our role is psychiatric assessment and ongoing mental health care. For straightforward childhood autism diagnostic assessment with ADOS-2 administration, families are sometimes better served by a developmental paediatrician or psychologist trained in ADOS-2 in person. We will refer where that is clearly the better fit, and we work alongside those clinicians for the psychiatric components.
Where Lionheart adds the most value is complex presentations: autism with significant anxiety, depression, OCD, or ADHD; autism missed in adolescence or adulthood; autism in girls and women; and autism where medication management for co-occurring conditions is needed. Telehealth assessment of older children, adolescents, and adults is well-supported by current evidence.
For NDIS purposes, diagnosis from a psychiatrist, paediatrician, or appropriately qualified psychologist is generally accepted. We provide detailed reports written for both clinical and NDIS use, including functional impact and recommended supports.
Validated screening tools you can complete anonymously and share with any clinician.
ADHD is the most common condition co-occurring with autism. Useful comorbidity screen.
6-12 years
Anxiety is highly prevalent in autism. Validated for ages 8+.
8+ years
Depression is more common in autistic adolescents and adults than the general population.
18+ years
Conditions that often co-occur with Autism or share overlapping presentations.
ADHD assessment and treatment for children, adolescents, and adults. Specialist psychiatric care via telehealth across Australia, including stimulant prescribing and ongoing review.
Anxiety assessment and treatment for children, adolescents, and adults. Includes generalised anxiety, social anxiety, separation anxiety, panic disorder, and school refusal. Telehealth across Australia.
Obsessive-Compulsive Disorder (OCD) is a mental health condition involving intrusive thoughts and repetitive behaviours. Specialist assessment, diagnosis, and treatment via telehealth across Australia.
Depression assessment and treatment for children, adolescents, adults, and perinatal women. Specialist psychiatric care via telehealth across Australia.
Frequently Asked Questions
Common questions about Autism
For older children, adolescents, and adults, telehealth psychiatric assessment of autism is well-supported by current evidence and produces reliable diagnostic conclusions in most cases. For young children where ADOS-2 administration is critical, in-person assessment by a developmental paediatrician or specialised psychologist is often preferable. We will guide you to the best assessment pathway based on age and presentation.
Yes. NDIS accepts autism diagnosis from psychiatrists, paediatricians, and appropriately qualified psychologists. We provide reports specifically structured to meet NDIS evidence requirements, including functional impact and recommended supports. Your local NDIS planner will use this report as part of the access decision.
Yes, and this is one of the most common presentations we see in girls. Skilled assessment looks for evidence beyond observable behaviour — exhaustion, sensory experiences, internal social effort, and the difference between school presentation and home decompression. Parent and self-report are critical, not just clinical observation.
Yes. Adult autism assessment is valid, often deeply useful, and increasingly common. A comprehensive psychiatric assessment includes developmental history, current functioning, sensory experiences, and screening for common co-occurring conditions like ADHD and anxiety. Many adults find diagnosis significantly reframes their understanding of themselves and informs how they organise their work, relationships, and self-care.
Diagnosis does not change who a child is — it provides language and understanding. For many families, diagnosis unlocks support that genuinely improves quality of life: school accommodations, allied health, NDIS funding, and informed parenting strategies. Diagnosis is private; you decide who knows. The risk of not diagnosing is missing the support a child genuinely needs.
No. Autism is not treated with medication. We treat co-occurring conditions when they are causing distress: ADHD, anxiety, depression, OCD, severe sleep difficulties. The aim is never to make someone less autistic — it is to make distressing, impairing co-occurring conditions easier to live with.
We partner with GPs and healthcare professionals to provide comprehensive psychiatric assessments and ongoing collaborative care for your young patients.
Questions about referring? Contact us at hello@lionheartclinic.com.au
Why Choose Telehealth from Australia?
Access specialist psychiatric care without leaving home
Collaborative approach involving parents and carers throughout the journey, with clear communication and support every step
All psychiatrists are Fellows of RANZCP with specialist training in child & adolescent mental health
Secure video consultations from home, reducing stress for children and saving family time
Access specialist care sooner with telehealth appointments across all Australian states and territories
Investment in Your Care
Clear pricing for initial psychiatric assessment
A comprehensive 1.5 hour clinical consultation including:
Medicare Rebates Available
With a valid GP referral and Mental Health Treatment Plan, you may be eligible for Medicare rebates. Please check with Medicare for current rebate amounts.
Follow-up Consultations
If ongoing care is recommended, follow-up appointments are available at standard private psychiatry rates.
For current fees, please or reach out to us directly.
To book an appointment, ask your GP for a referral to Lionheart Clinic. Referrals are valid for 12 months and Medicare rebates apply. We also accept private bookings and NDIS participants.
Important: We Are NOT an Acute Crisis Service
Lionheart Clinic provides non-acute psychiatric assessment and ongoing care. If you, your child, or a young person you care for are experiencing any of the following, please seek immediate help:
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