Adult Autism Assessments in the UK
Professional diagnosis with clear reports and tailored support. Book Your Autism AssessmentUK National Autism Assessment Service - Wait Time Currently 7-10 Days
“Autism diagnoses in England have surged in recent decades, pushing NHS services to their limits.”
Why Seek an Autism Assessment as an Adult?
- Provide clarity about lifelong challenges.
- Improve self-understanding and self-compassion.
- Open access to workplace accommodations and legal protections (Equality Act 2010).
- Support healthier relationships and communication.
- Offer guidance on treatment, therapy, or community resources.
See our Autism Assessments for Children page if you are also exploring assessments for your child.
Signs of Autism in Adults
- Finding social interactions confusing, stressful, or exhausting.
- Preferring routine, predictability, or solitude over spontaneity.
- Having intense interests or “hyperfocus” in specific areas.
- Sensitivity to light, sound, touch, or other sensory input.
- Experiencing anxiety, burnout, or misdiagnosed mental health conditions.
- Feeling the need to “mask” or copy others to fit in.
Contact Miriam to Discuss Your Assessment
If you’d like to talk through the assessment process, have questions about which service is right for you, or simply want to understand what to expect, Miriam Danso, our Psychology Assistant, is here to help.
Miriam can guide you through the initial steps, explain how our assessments work, and ensure you feel comfortable and informed before booking.
What to Expect From a Private Adult Autism Assessment
Our adult autism assessments are designed to be respectful, detailed, and tailored to your needs.
The process usually includes:
1. Pre-assessment Stage
Forms for you (and, if possible, someone who knew you as a child) plus a GP Summary Care Record (SCR).
2. Main Assessment
Includes an ADOS-2 and ADI-R assessment, lasting several hours, either online or in person at our West Berkshire clinic.
3. Feedback and Report
After a multidisciplinary review, you will receive a full written report, plus a feedback session with one of our clinicians to discuss the outcome, recommendations, and next steps.
Learn more about our full Autism & ADHD Assessment services.
Cost and What’s included
Adult Autism Assessment - £1,900
Includes:
1
Pre-assessment forms and review
2
ADOS-2 and ADI-R assessments
3
Multidisciplinary diagnostic review
4
A full written report
5
Feedback consultation and personalised recommendations
See our Autism Assessments for Children page if you are also exploring assessments for your child.
Frequently Asked Questions
How long does an Adult ADHD assessment take?
The Adult ADHD assessment typically lasts several hours across two appointments, with breaks provided.
Can the Adult ADHD assessment be done online?
Yes. Adult ADHD assessments can be carried out online or in person at our Berkshire clinic.
Will my Adult ADHD diagnosis be recognised by the NHS?
Generally, Yes. We follow NICE guidelines as best we can to provide a high-quality Adult ADHD assessment; however, NHS and educational establishments are not obliged to accept our assessments.
Do I need my GP’s involvement with my Adult ADHD diagnosis?
We require a Summary Care Record (SCR) from your GP as part of the Adult ADHD assessment process.
What support is available after an Adult ADHD diagnosis?
We provide signposting to support groups, therapeutic services, and can liaise with your GP regarding further care.
Begin Your Adult Autism Assessment
Taking the step to book a private adult autism assessment can be life-changing. If you’re ready to gain clarity, support, and practical solutions, complete our pre-assessment process today.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Call us: 01635 791 301
Your Experienced Adult ADHD Assessor
Dr Melanie Stevens
Consultant Clinical Neuropsychologist
I am Dr Melanie Stevens, a Consultant Clinical Neuropsychologist. I have worked in psychological practice for over 22 years and completed my Doctorate in Clinical Psychology in 2006 and a Post Doctorate Diploma in Clinical Neuropsychology in 2012.
I am fully registered with the Health & Care Professionals Council and a Member of the Association of British Psychologists. I have an undergraduate, master’s degree, Doctorate in Clinical Psychology at Coventry & Warwick University and a Post Doctorate Diploma in Clinical Neuropsychology at Glasgow University. I was awarded my Consultant Grade in Clinical Psychology in 2012. I have various therapy training including EMDR to advanced level. I am trained and experienced in ADOS and ADI-R assessments, and expert witness training.
I have extensive experience in the assessment and treatment of complex psychological difficulties and neuropsychological challenges. This includes assessments of capacity, cognitive assessments, rehabilitation and adjustment. I have worked in inpatient acute units including NHS, outpatient departments and rehabilitation services. I have worked in brain injury hospitals, for example Walsgrave, and several independent inpatient and outpatient units, at senior Clinical Psychologist and Consultant Clinical Neuropsychologist level.
I have worked for the MOD in complex trauma, for example PTSD, and mental health. I have over 15 years’ experience providing ASD assessments for the NHS and various other providers, for children, adolescents and adults, with ages ranging from 4 years to 88 years. I have carried out various other professional/commercial presentations, including international presentations in China, South Africa as well as the UK, and publications during my career, including a book chapter, and have been involved in training on the doctorate program at Birmingham University.