Autism Assessments

Exploring an autism assessment is an important moment in your life. We believe in providing the most high-quality assessment, the best possible experience, and an outcome that is right for you.

Whilst autism is a neurodevelopmental condition, people come to us to explore an autism assessment at any stage in life.  Many young people now recognise themselves as being neurodivergent and find the diagnosis useful in identifying coping strategies. It is also never too late to get assessed. Even clients in their 60s and 70s have described the process as ’empowering’ and ‘validating’, and the outcome has helped them to make sense of many longstanding challenges.

Having your autism assessment at MAPP

We offer comprehensive autism assessments that are holistic and person-centred. 

We endeavour to meet with you promptly and be flexible with our approach.

Your clinician will explain and go through each step of the assessment with you. At the end of our assessment, we will also explain why we gathered the information we did! 

We will explore different aspects of your life and your concerns, before arriving at a diagnostic conclusion. Ultimately, our aim is to find meaningful ways of understanding your experiences, preferences and traits. This may mean using an autism framework and/or other psychological formulations. 

Our clinicians use ‘gold standard’ autism assessment tools based on the National Institute for Health and Care Excellence (NICE) Guidance’s recommendations. This includes the Autism Diagnostic Observation Schedule, Second Edition (ADOS-2) and a developmental history interview informed by the Autism Diagnostic Interview-Revised (ADI-R). Our clinicians are also involved in developing the current developmental history interview protocol.

Our approach ensures that our findings are reliable, accurate and valid. This means that your autism diagnostic assessment outcome will be recognised by the NHS and internationally.

What to expect at your autism assessment?

An autism assessment at MAPP will typically involve the following:

Step 1: Initial autism screening

Initial screening

An initial meeting to understand your current concerns, life circumstances, and early life experiences. This can be in person or via video call.

Following the initial screening, we will share our recommendations and decide with you the best way forward.

Screening outcome

After our initial meeting, we will share our recommendations and advise on a plan forward.

If an autism assessment is recommended, we will arrange further sessions with you.

If an autism assessment is not the best way forward at this stage, we will suggest other kinds of support within our clinic or link you up with our professional network for further help.

Step 2: Autism assessment

Clinical interview

An initial meeting in person or via video call to understand your current concerns, life circumstances, and early life experiences. Afterwards, we will share our recommendations and decide with you the best way forward.

Observational assessment

We will carry out a standardised assessment called the ADOS-2 will be carried out. This gives us an opportunity to understand your social skills.

Informant interview

If possible, this involves speaking with someone who knows you well. We will include this information in your report. 

Sometimes, we may need additional assessment meetings to gather more information and better understand your experiences and needs, in which case, we will discuss this with you.

What to expect at your feedback?

We will share with you the diagnostic outcome. This involves explaining the diagnosis of ASD and how the information gathered helps us to reach our conclusion. There are three possible outcomes:

You meet the diagnostic criteria

We will explain why we think an autism framework makes sense in understanding your experiences and presentation.

We will discuss your strengths and needs.

Where appropriate, we will explore therapy options for your difficulties.

You do not meet the diagnostic criteria

We will consider differential diagnoses or alternative ways of understanding your difficulties.

Additionally, we will discuss the kind of help that you would benefit from.

We are not able to conclude (for now)

Sometimes people may have experienced complex trauma or mental health difficulties. The effects on their well-being and functioning may need to be addressed before considering a neurodevelopmental diagnosis.

In this case, we will discuss the kind of help that you would benefit from. Subsequently, we may continue working with you or signpost you to our colleagues in our professional network.

Ultimately, our aim is to find the best way to understand you and your needs, and identify the most helpful way forward for interventions and support.


The prices reflect our experiences and expertise in working with autistic individuals, as well as the quality of service you will receive. 

Book Now

If you are interested in arranging an assessment or finding out more information, please leave your contact details and your request below. Our clinicians will get in touch with you within 24 hours (excluding bank holidays). 

Marylebone Autism Psychology Practice (MAPP) 2022

85 Wimpole Street, Marylebone, W1G 9RJ