Expert Neurodevelopmental Care for Every Age
Specialist ADHD, Autism, Dyslexia and DCD assessments for children and adults — trusted by families across Oxfordshire and Guernsey.
We are officially award-winning
On Friday 5th June 2026, Dr Cassie & Associates were named SME of the Year at the 30th Oxfordshire Business Awards — recognising our team's dedication to compassionate, family-centred neurodevelopmental care across Oxfordshire and Guernsey.
Read the StoryYour pathway, made clear
Not sure where to begin? Pick the description that sounds most like you — each one leads to a dedicated page with the right services, the relevant fees, and a clear next step.
For Parents & Carers
You're worried about your child's development, behaviour, or learning — and you're not sure where to start. We'll help you work out what matters first.
Start Here →For Adults Seeking a Diagnosis
You think you might have ADHD, Autism, or both. Maybe you've wondered for years. Start here for a clear, supportive pathway.
Start Here →For Those Already Diagnosed
You have a diagnosis and need ongoing support — medication, therapy, school help, or advocacy. Whatever stage you're at, there's a clear next step.
Start Here →
A Warm, Experienced Team Dedicated to Your Family
We're a warm, experienced team providing friendly, family-centred assessments and ongoing support for children, young people, and adults across the spectrum of neurodiversity — including Autism, ADHD, DCD, and Dyslexia.
Our multidisciplinary team delivers personalised, evidence-based care, including therapy and medical support where appropriate. From our welcoming Oxfordshire clinic, alongside our services in Guernsey, we focus on each individual's strengths and offer practical, tailored support to help every person thrive at each stage of life.
What we stand for
The principles that shape every assessment, conversation, and ongoing care plan.
Trusted by Families
Across Oxfordshire & Guernsey
“Amazing from start to finish! This process has changed our lives. If anyone needs a private diagnosis Dr Cassie should be your first choice, so understanding friendly and helpful.”
“We felt listened to, supported and at ease with Dr Cassie and her team.”
“The environment was relaxing and very friendly. My assessment was great, I felt listened to and validated. All in all, the process was straightforward, and now I can make positive changes in my life thanks to my diagnosis and medication.”
“So professional but so informal. Made us all feel at ease and be able to be completely honest and open. My son equally felt very relaxed and happy.”
“A caring and supportive approach to a professional diagnosis process. Thank you.”
Your Assessment Journey
From first enquiry to ongoing support, we guide you through every step with clarity and compassion.
Initial Enquiry
Contact our team to discuss your concerns. We'll help you understand which assessment is right for you or your child.
Assessment
A thorough, face-to-face assessment at our Wallingford clinic with one of our specialist clinicians.
Detailed Report
A comprehensive written report with diagnosis, recommendations, and practical strategies for home and school.
Ongoing Support
Follow-up appointments, medication management, therapy sessions, and SEN guidance as needed.
Common Questions
Everything you need to know before booking. Can't find your answer? Get in touch and we'll help.
Appointment length varies by assessment pathway. Many appointments last between two and five hours, and some pathways involve more than one appointment. We'll give you a clear timeline at your initial call.
Yes. We have a dedicated adult clinic offering ADHD and Autism assessments, medication consultations, occupational therapy, and sensory needs assessments for adults of all ages.
Waiting times vary by service and clinician. Please contact our team for current availability.
No GP referral is needed. You can contact us directly to arrange an assessment. We welcome self-referrals from parents and adults seeking diagnosis and support.
Our assessments follow relevant NICE guidance and are conducted by experienced, registered clinicians. Reports can be shared with schools, GPs, NHS services and local authorities to inform support planning and, where appropriate, EHCP applications.
We're based at The Stables, Howbery Park, near Wallingford, Oxfordshire. The site has ample free parking and is easily accessible from the A4130.