What is Autism Spectrum Disorder (ASD)?

Autism Spectrum Disorder (ASD) is a lifelong neurodevelopmental condition that impacts how a child interacts and communicates with others. As the name Spectrum suggests, it can affect people in different ways. Not every child with Autism Spectrum Disorder will have the same challenges, but they will share similar difficulties in key diagnostic areas.

Children with Autism Spectrum Disorder (ASD) may:

  • Have difficulties in social situations, interactions and with understanding relationships.
  • Find it hard to manage change, resulting in extreme anxiety.
  • Exhibit restrictive/repetitive behaviour.
  • Have highly focussed interests/hobbies.
  • Have over or under sensitivity to light, pain, temperature, certain sounds, colours, smells, or textures.

It is believed that 1 in 160 children have Autism Spectrum Disorder (ASD) worldwide. Scientific evidence suggests environmental and genetic factors may make a child more likely to have Autism Spectrum Disorder (ASD). Males are four times more likely to be diagnosed with Autism Spectrum Disorder (ASD), compared to females. This may be partially due to females being better at masking their difficulties, hence making it more difficult to diagnose. Autism Spectrum Disorder (ASD) often runs in families.

There is however no evidence that any childhood vaccine can cause Autism Spectrum Disorder (ASD) .

Children with Autism Spectrum Disorder (ASD) have difficulties communicating with others, including non-verbal communication such as body language and eye contact.

Examples include:

  • Little or no eye contact.
  • Limited facial expressions.
  • Delay in language from a young age or speaking with an unusual accent.
  • Talking about particular areas of interest in a lot of detail.
  • Often being quiet or talking at you rather than engaging in a to and fro conversation.
Children with Autism Spectrum Disorder (ASD) also have difficulties in their social skills, often finding it hard to express their own feelings and have limited insight into how others are feeling. This impacts on developing age-appropriate friendships.

Examples include:

  • Difficulties with sharing, being possessive about their things and not taking turns.
  • Underdeveloped imaginative play.
  • Preference for solitary play.
  • Difficulties with understanding jokes and often taking things literally.
Children with Autism Spectrum Disorder (ASD) are more likely to exhibit repetitive and restrictive behaviours.

Examples include:

  • Repetitive hand flapping or other body movements.
  • Changes to regular routines are often difficult to manage.
  • Very strong interests in particular things such as cars, train maps, or cartoon characters.
Children with Autism Spectrum Disorder (ASD) are also more susceptible to certain health conditions such as:
  • Attention Deficit Hyperactivity Disorder (ADHD)
  • Learning difficulties
  • Epilepsy
  • Sleep difficulties
  • Sensory difficulties
  • Selective diet
  • Anxiety

Private Autism Assessments. Book a 15 minute consultation – £49.

FIND OUT MORE

FAQs

How long is the wait time for a children's private autism assessment?

For private assessments, we aim to arrange a pre-assessment with a Specialist Doctor within 72 hours. If a full autism assessment is recommended, all appointments are typically completed within 4 weeks. Some delays may occur for example if the educational placement is closed during the holiday period. A comprehensive report, including a diagnosis where appropriate, is usually delivered within 10 days of your final appointment.

If you are referred through your NHS Trust, timelines are similar, although this can vary depending on local demand.

Do I need a GP referral for a private autism assessment?

No, you do not need a GP referral to access our private autism assessment service. Your first step is a consultation with one of our Specialist Doctors, all of whom also work within the NHS. They will discuss your child’s needs, development, and any concerns you or their school may have. If appropriate, you will be offered a short video consultation to review your child’s needs in more detail and decide whether to proceed with a full assessment.

What is included in a private autism assessment?

A private autism assessment at Autism Clinic London includes a detailed developmental history, clinical observations, and a structured diagnostic ADOS assessment. Input from parents, caregivers, and educational placements may also be included to ensure a complete understanding of your child’s needs. All of our reports mirror those you would receive from an NHS assessment.

How much does a private autism assessment cost in the UK?

The cost of a private autism assessment varies depending on the provider and the complexity of the assessment. To compare costs from other providers our costs cover the initial consultation, full diagnostic assessment, and a detailed written report. Mostly, you will be charged over £2,000 with some private clinics charging up to £3,500. We work hard to deliver our assessments at a lower rate than most of the market without compromising on quality. For example, some providers will assess your child without meeting them face-to-face. We believe that for an assessment to be thorough, we have to see your child in person.

Is a private autism diagnosis recognised by the NHS and schools?

Yes, a private autism diagnosis carried out by Autism Clinic London is recognised by schools, the NHS and local authorities. All our assessments are carried out by our multi-disciplinary team who follow NICE guidelines.

Many schools and local authorities accept private reports to support EHCP applications and access to support services.

Do you do assessments for ADHD?

Although our clinicians do carry out ADHD assessments in their NHS practice, we do not currently offer ADHD assessments at Autism Clinic London. Our Autism Assessments do include a comprehensive report and will highlight if there are possible ADHD concerns, which can then be explored in future by your child’s local NHS trust or by another provider.

What age can a child be diagnosed with autism?

Children can be assessed for autism from around 18 months onwards. Early diagnosis can help children access the right support sooner, improving long-term outcomes. We see children aged between 2 and 14 years.

What are the signs that my child may need an autism assessment?
If you have concerns, a specialist consultation can help determine whether an assessment is appropriate. Common signs include:
• Delayed speech or communication difficulties
• Challenges with social interaction
• Repetitive behaviours or strong routines
• Sensory sensitivities
How accurate is a private autism assessment?

Private autism assessments are highly accurate when conducted by experienced clinicians using evidence-based diagnostic tools and NICE guidelines. The quality of the assessment depends on the expertise of the professionals involved and the thoroughness of the process. We are regulated, inspected and rated by CQC which ensures that you can depend on the quality of our assessments.

What happens after an autism diagnosis?
After a diagnosis, you will receive a detailed report outlining your child’s strengths, challenges, and recommended support strategies. This can help with:
• School support and SEN provisions
• EHCP applications
• Access to therapies and interventions
You will also be offered post-diagnostic support.
Can adults get a private autism assessment too?

Yes, many private services offer autism assessments for adults as well as children. The process is similar but tailored to adult experiences, including work, relationships, and mental health history. We are a specialist clinic that only assesses children.

Is a private autism assessment faster than the NHS?

Yes, private assessments are significantly faster. While NHS waiting lists can often exceed 12–24 months, a private assessment at Autism Clinic London will typically be completed within four weeks.

Will schools accept a private autism assessment report?

Schools should accept private autism assessment reports, particularly when completed by qualified clinicians who follow NICE guidelines. These reports can be used to support SEN planning and requests for additional support.

Can I use a private diagnosis to apply for an EHCP?

Yes, a private diagnosis can support an Education, Health and Care Plan (EHCP) application. The report provides professional evidence of your child’s needs and recommended support.

What is the difference between screening and a full autism assessment?

A screening is an initial check to see whether autism may be present, while a full assessment is a comprehensive diagnostic process that can lead to a formal diagnosis. If you are concerned that your child has signs of Autism, please contact us and we can arrange an initial assessment in the first instance.

Do you offer online only autism assessments?

Some parts of the assessment process, such as initial consultations and diagnostic interviews with parent or carer, can be carried out online. However, a full diagnostic assessment will require in-person observation. Other providers may offer fully virtual assessments but such assessments do not meet our standards.

Why is an autism diagnosis important?

An autism diagnosis helps individuals and families understand their experiences, access appropriate support, and make informed decisions about education, healthcare, and daily life.

Does an autism diagnosis change anything?

A diagnosis doesn’t change who your child is, but it can open doors to support, reduce uncertainty, and provide clarity for families and professionals. Once you have a confirmed diagnosis, you can also access appropriate and targeted post-diagnostic care, which can help day-to-day life enormously.

Can a diagnosis help at school?

Yes, a diagnosis can help schools better understand your child’s needs and provide appropriate support, accommodations, and learning strategies. It can help inform an EHCP and a more complete approach to your child's educational needs.