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The Thistle Clinic The Thistle Clinic Neurodevelopmental & Psychiatric Clinic
Autism Assessment

Private Autism Assessment for Adults & Children

A careful, Consultant Psychiatrist-led assessment for adults and children who want a clearer understanding of whether autism may help explain longstanding differences in communication, relationships, routines, sensory experience or day-to-day life.

Adult assessment from £1,750

Children's autism assessment fees are quoted individually. Your assessment is considered in context — not reduced to a checklist.

A clinician listening attentively during a consultation, notebook in hand
Consultant Psychiatrist-led NICE-aligned GMC-registered clinicians
A considered starting point

Is an Autism Assessment worth considering?

People come to an autism assessment for many different reasons. Some have wondered for years whether autism might help explain their experience. Others are seeking clarity for a child, or are trying to make sense of questions that overlap with ADHD, anxiety or other aspects of mental health.

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I

Longstanding questions

You may have noticed patterns in communication, relationships, routines or sensory experience that have been present for a long time but never fully made sense.

II

A child's development or daily experience

Parents may be looking for a clearer understanding of differences that are affecting school, friendships, family life or everyday routines.

III

Masking or coping quietly

Some adults reach assessment after years of adapting, compensating or appearing to cope while finding social or sensory demands unusually effortful.

IV

ADHD, autism — or both?

Sometimes autism is not the only question. ADHD and autism can overlap, and a careful assessment should leave room for complexity rather than forcing the experience into one explanation too early.

None of these experiences confirms autism on its own. An assessment is a way to look at the wider picture carefully and decide what the evidence supports.

What to expect

A clear process, explained before you begin

We will explain what information is needed and what your appointments will involve before you commit to the assessment. The aim is to build a rounded clinical picture rather than make a judgement from a single questionnaire or conversation.

01
Start with an enquiry

Tell us who the assessment is for and what you would like help understanding. You do not need to work out the diagnosis yourself before contacting us.

02
Prepare the relevant background

We will confirm what background or developmental information is useful for your assessment. Depending on the individual, this may include information about earlier development and day-to-day experience.

03
Meet the clinician

The assessment explores the question in context: current experience, relevant history and other factors that may help explain the overall picture.

04
Clinical consideration

The information gathered is considered together before an outcome is reached. The purpose is accuracy and understanding, not to produce a predetermined diagnosis.

05
Outcome, report and next steps

We discuss the outcome with you, provide a written report and talk through appropriate next steps.

Different life stages

The same clinical question can look different in children and adults

Children

For a child, understanding development and everyday context can be especially important. The team will confirm what information is useful and who should contribute before the assessment begins.

Adults

For adults, assessment may involve looking back at earlier life as well as understanding present-day experience. This can be particularly helpful when someone has spent years adapting, masking or finding their own ways to manage.

The process should fit the person being assessed — not force every child or adult through identical wording or assumptions.

When the picture overlaps

Autism, ADHD — or both?

Autism and ADHD can overlap, and some people arrive with a genuine question about both. Difficulties with attention, social communication, routines, sensory experience, overwhelm or executive functioning do not always point neatly to one explanation.

If the information you share suggests that both ADHD and autism may need to be considered, we can discuss whether a Combined ADHD & Autism Assessment is a more appropriate starting point.

This is not an online diagnosis or a sales route into a larger package. It is simply a way to make sure the clinical question is framed properly before you proceed.

Explore the ADHD Assessment → Explore the Combined ADHD & Autism Assessment →
Senior clinical oversight

The person considering the whole picture matters

The Thistle Clinic is Consultant Psychiatrist-led. We place senior clinical judgement at the centre of assessment because neurodevelopmental questions can be complex, particularly when traits overlap or there are other mental-health considerations.

Your assessment will be allocated to an appropriate clinician from our neurodevelopmental team. We will confirm who is involved before your assessment begins.

Meet our clinical team →
Two people in conversation in a calm, naturally lit consulting space
Clear before you book

What is included in the Autism Assessment fee?

Adult assessment from £1,750

Children's autism assessment fees are quoted individually. Before you book, we will confirm the fee and exactly what your assessment includes in writing. Following the assessment, we provide a written report and discuss appropriate next steps.

Assessment format

Online or face-to-face

Appointments may be available online or in person, depending on the individual and the requirements of the assessment. If you have a preference, tell us when you enquire. We will confirm the appropriate format before you book.

Clarity either way

What if the assessment does not result in an autism diagnosis?

The purpose of an assessment is not to confirm a diagnosis that has already been assumed. It is to understand the evidence carefully.

If the assessment does not support an autism diagnosis, that is still a meaningful clinical outcome. We will explain the outcome, the report will reflect the assessment findings, and we will discuss appropriate next steps based on what has emerged.

Common Questions

Autism Assessment FAQs

No. You do not need to diagnose yourself or your child before contacting us. The starting point can simply be a question you want help understanding.
Yes. Autism assessment can be relevant in adulthood, including for people who have spent years adapting or masking and want a clearer understanding of longstanding patterns.
Developmental history can be relevant to an autism assessment. We will tell you what information is useful for the individual assessment and whether information from another person is needed.
Tell us that when you enquire. Where both may be relevant, we can discuss whether the Autism Assessment or the Combined ADHD & Autism Assessment is the more appropriate route. This discussion does not itself make a diagnosis.
Online appointments may be available. The appropriate format depends on the individual and the assessment requirements, and this will be confirmed before you book.
You will receive a written report and an explanation of the assessment outcome, with appropriate next steps discussed with you.
A clinical report can provide a clear record of the assessment findings and may support later discussions with healthcare professionals, education settings, universities or employers where relevant. Each organisation makes its own decisions about the evidence it requires, so The Thistle Clinic does not guarantee third-party acceptance.
We will explain the outcome and what the assessment has shown. The aim is useful clinical clarity, whether or not the final outcome is an autism diagnosis.
The current published adult price starts from £1,750. Children's autism assessment fees are quoted individually. The exact fee and what is included should be confirmed in writing before booking.
A calm next step

Not sure whether an Autism Assessment is the right starting point?

You do not need to have the answer before you contact us. Tell us what you are trying to understand and we can help you identify the most appropriate next step. See Fees or Contact us directly.

Send an Enquiry

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