Expert Neurodevelopmental Care for Every Age
Specialist ADHD, Autism, Dyslexia and DCD assessments for children and adults, trusted by families.
Your pathway made clear
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 are a friendly, highly experienced multidisciplinary team providing specialist assessments, practical advice, therapeutic support and ongoing clinical care for children, young people and adults.
Based in Oxfordshire, our clinic brings together a wide range of medical, psychological, therapeutic and educational professionals, allowing us to offer truly personalised, holistic care. Whether you are seeking a diagnostic assessment, support with development, learning, emotional wellbeing or everyday challenges, or simply some guidance about where to begin, our team is here to help.
We understand that knowing what support is needed isn’t always straightforward. You don’t need to have a diagnosis, or even know whether an assessment is appropriate, to contact us. We take time to listen, understand your concerns and help you explore the options available, ensuring that any recommendations are guided by individual needs rather than a particular diagnosis.
Our comprehensive multidisciplinary team includes experienced paediatricians, psychiatrists, psychologists, speech and language therapists, occupational therapists, specialist nurses and other therapeutic and educational professionals. Working collaboratively, we take time to understand each person’s individual strengths, challenges and circumstances, providing evidence-based recommendations and practical strategies that can make a meaningful difference to everyday life.
We believe that a diagnosis can be incredibly valuable, but it should never be the only route to accessing help and support. Where a diagnostic assessment is appropriate, we provide thorough, independent clinical evaluations that may or may not result in a diagnosis. Equally, we offer a wide range of support beyond assessment, including speech and language therapy, occupational therapy, emotional and psychological support, educational advice, medication management and ongoing specialist reviews.
We strongly value the benefits of face-to-face care. From our welcoming clinic in beautiful Howbery Park, near Wallingford, we provide a calm, supportive environment where children, young people and adults can feel comfortable, listened to and understood. Many of our team also bring personal experience of neurodiversity, strengthening the compassion and understanding at the heart of our approach.
As a Care Quality Commission (CQC) registered clinic, we are committed to delivering safe, high-quality, evidence-based care. Above all, we believe in looking beyond labels to understand the whole person, recognising their strengths, identifying their needs and helping them access the right support at the right time.
Whether you are looking for a comprehensive assessment, ongoing care, specialist therapy or simply some guidance about where to begin, we are here to help.
If you have any questions or would like to learn more about how we can support you or your family please don’t hesitate to get in touch with our fantastic admin team!
We are officially award-winning
On Friday 12th 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 StoryOur mission
At Dr Cassie and Associates, we provide holistic, family-centred care for children, young people, and adults. Our expert team delivers personalised, face-to-face assessments that highlight each person’s strengths and challenges, offering clear, tailored strategies to support them.
In our friendly, welcoming clinic, we are committed to providing seamless, continuous care from initial assessment through every stage of the journey, helping individuals and their families navigate with empathy, professionalism, and effective, bespoke support.
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. Such a gift and an amazing lady.”
“A caring and supportive approach to a professional diagnosis process. Thank you.”
“Dr Cassie and team were nothing short of exceptional, they made me and my son feel heard. The assessments were thorough and age appropriate. They were friendly and helped every step of the process, providing a beautiful environment and engaging with my son, very helpful even down to supporting with payment plans. The reports given broke everything down and we got so much information and resources from them.”
“Dr Cassie has been an absolute godsend to our family. She has been very responsive to queries, providing information for us and asking lots of questions to understand our situation. Most importantly she has been a very friendly face for our son to interact with and get the diagnosis he needs to help him in the future. He gets very excited about seeing Dr Cassie for follow ups and we will be staying with her for future medication consultations. I can‘t recommend Dr Cassie highly enough to anyone, and have recommended her to a number of other families already.”
“We have been extremely impressed with the experience we as a family have received at Dr Cassie’s clinic. Everyone involved has been incredibly helpful, friendly, professional and supportive. The clinic immediately gave us a warm at home feeling, which helped all of us, as we didn’t know what to expect. Dr Cassie and Aimee were fantastic with our son and put him at ease very quickly. The admin staff have been brilliant too – always replying quickly and informatively. Thanks all!”
“Dr Cassie has been a great help to me and has made my life so much easier with her ideas, knowledge and encouragement. Cassie answers my questions in lots of detail so that we understand what she means. I feel listened to and that someone outside my world gets me. I look forward to seeing her each time we meet.”
“I just had to write to you today and really thank you from the bottom of our hearts for your help with our son this year.”
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.