Timely diagnosis without having to wait

Are you worried you, or your child, may have Autism Spectrum Disorder (ASD) and you don’t want to wait several months to see a specialist?

Do you feel that a previous diagnosis may be incorrect and would like a second opinion?

We can complete a full diagnostic assessment – the outcome of which will either be a diagnosis of ASD that you can be confident in or confirmation that you do not have autism.

We understand what works and does not work and there are no shortcuts as we believe less robust assessments are more likely to result in a missed or incorrect diagnosis.

Meet the

X consultation


X minutes


X surgery


X weeks


From £X

What is the process?

Our diagnostic assessment consists of:

  • Clinical interview, including taking a developmental history
  • Direct observation of your communication and interaction skills in clinic
  • Review of information from informants (in person or via reports)
  • Diagnostic discussion by assessing team
  • Feedback meeting with you

*For children, we do an additional school observation and discussions with teaching staff.

We use the best available tools – ADOS-2 and ADI-R – to do our assessment and you, or your child, will always be seen by more than one clinician.

Why choose us?

The diagnostic assessment we offer is thorough and based on several years’ experience, plus knowledge of relevant guidance and research.

We understand what works and what does not work in terms of completing reliable diagnostic assessments. There are no short-cuts and less robust assessments are more likely to result in diagnoses being missed or children being incorrectly diagnosed.

Will my private diagnosis be recognised?

The main reason why someone would question a diagnosis is if the assessment is of low quality. A high-quality assessment is one that includes seeing the child in different settings, the opinion of more than one clinician and consideration of alternative explanations and is completed by experienced and suitably qualified clinicians.

The diagnostic assessment that The Autism Service offers is thorough and in line with national guidance. There is, therefore, no reason for another agency to not recognise a diagnosis made by us. You will receive a report that evidences the reason for our decision making and if there are any issues we can speak to agencies on your behalf.

How much does it cost?

The fee for a diagnostic assessment for an adult is £1495.

This includes a report and advice, and a dedicated point of contact or keyworker during the assessment process.

The fee for a diagnostic assessment for a child is £2095.

This is payable in two parts: you pay £395 for the initial observation of your child in clinic and only pay the remaining £1,700 if the clinician recommends the full assessment. This way, you do not pay for more than you need.

For children who attend a school that is over 20 miles from the clinic base, an additional fee will be incurred per mile for travel.

*Additional fees may apply in exceptional circumstances, please refer to our terms and conditions.

What is
the cost?

Although Summerfield Healthcare is a private practice our fees are low cost and structured with you in mind. Initial consultation fees are listed below:

Initial Assessment


Diagnostic Assessment (Child)

(Includes initial assessment fee.)


Diagnostic Assessment (Adult)

(Includes initial assessment fee.)


the team

Dr Lisa Williams

Lead Clinical Psychologist

A consultant clinical psychologist with over 14 years’ experience, Dr Williams has worked in three different ASD teams in the NHS and has led on diagnoses for preschool children all the way through to older adults, both with and without a learning disability.

We can help

0333 9000 010

Email us

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