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Private Autism Diagnostic Assessment Services UK

Private Autism Assessments and Diagnosis

Available nationwide for adults and children aged six and above. Each assessment is delivered by experienced clinicians using a gold-standard and person-centred approach, helping every individual feel understood and supported throughout the process.

Start your assessment within 24 hours of booking

Dedicated Patient Support Coordinator – a single point of contact throughout your journey

Online or in-person appointments available

Adheres to NICE guidelines

Clear recommendations for next steps, support, and treatment options

Book an assessment

Expert Autism Assessments You Can Trust

Autism assessments are available online across the UK, adhering to NICE guidelines. Our clinicians receive ongoing training to understand how autism presents across different genders, ages, and cultural backgrounds. Combining specialist knowledge, evidence-based tools, and a person-centred approach, we deliver clear, comprehensive assessments that reflect each individual’s unique profile.

Common Signs of Autism

Autism presents differently in every individual. While many autistic children and adults share common traits, these experiences vary widely and are often shaped by environment, gender, and life stage. Recognising these patterns can help people better understand themselves and access the right support.

Adult Autism Signs

Unique communication style or preference for direct, honest conversation

Strong need for routine or predictability

Passion for special interests

Heightened sensitivity to sounds, lights, textures, or smells

Feeling socially drained or misunderstood in certain settings

Tendency to take language literally or miss the implied meaning

Using strategies (often called masking) to manage social expectations

Child Autism Signs

May use limited eye contact or facial expressions in communication

Develop speech or language skills later than peers, or communicate in unique ways

Repeat words or phrases they find comforting or interesting

Prefer predictable routines and may find sudden changes challenging

Enjoy focusing deeply on specific topics, toys, or activities

Engage in repetitive movements such as rocking or hand-flapping

Experience heightened sensitivity to sounds, textures, lights, or smells

Prefer solitary play or side-by-side play and find groups overwhelming

Express emotions intensely or find it hard to regulate them at times

May interpret language literally or miss subtle social cues

Find comfort in familiar environments and clear expectations

What Happens in a Private Autism Assessment?

Our autism assessments for children and adults are designed to provide clarity, understanding, and tailored recommendations for ongoing support. Each stage is led by expert clinicians and adheres to NICE guidelines.

Before Your Diagnostic Interview

To ensure we’re the right service for you, we’ll begin with a brief triage process. You will also complete a set of questionnaires, alongside someone who knows you well (often referred to as an informant), helping us build a comprehensive understanding of your experiences. For a child assessment, these will be completed by the parent/guardian or the child’s school, where appropriate.

Your Diagnostic Interview

Your assessment takes place via secure video consultation with an experienced clinician.For adults one diagnostic interview takes place lasting up to 90 minutes.For children the process is split in to two interviews. The first is ADOS with the child in attendance lasting up to 60 minutes, and the second is a detailed interview with the parent/guardian only lasting up to 3 hours.

Your Outcome & Report

Following your assessment, our multidisciplinary team carefully reviews the findings against recognised diagnostic criteria. You will be invited to attend a feedback appointment to discuss the outcome, ask questions, and explore tailored support options such as talking therapy. Your detailed clinical report will be provided within 10 working days and, with your consent, shared with your GP.

Who We Help

Many children and adults with autism experience differences in communication, social interaction, and sensory processing, which can impact daily life. We offer understanding, diagnosis, and tailored support to help them thrive with confidence and independence.

Adults

We support adults seeking clarity, understanding, and guidance through comprehensive autism assessments and personalised recommendations for future care.

Adult Autism Assessments

Children

We help children aged six and over with early, accurate autism assessments and tailored support to promote learning, communication, and emotional development.

Child Autism Assessments

Support for Autism

RTN Mental Health provides tailored ongoing support for adults with autism, including talking therapies, social communication coaching, and sensory regulation strategies. Our team helps clients manage anxiety, improve daily functioning, and build meaningful connections promoting confidence, wellbeing, and long-term independence.

CBT for autism

Why Choose RTN Mental Health for Your Private Assessment?

Fast Assessments

Complete Autism diagnosis with assessments starting within 24 hours, online or in person.

Nationwide Coverage

Access our experts anywhere in the UK.

Prioritising Clinical Excellence

Clinician-led, adhering to NICE guidelines.

Ongoing Personalised Care

Ongoing support through therapy and coaching.

What Our Patients Say

See what our patients have to say about their experience with RTN Mental Health. We’re proud to provide trusted, compassionate, and effective care that makes a real difference.

Autism Assessment FAQ

Who can have an autism assessment with RTN?

Our autism assessments are designed for individuals aged 6 and over who may experience traits of autism and want clarity, understanding, or formal diagnosis. You can self-refer for a private assessment.

Are assessments available online?

Private assessments take place securely online via video call.

What happens during an autism assessment?

Your assessment is led by experienced clinicians who use gold-standard diagnostic tools, such as the ADOS-2 and ADI-R, alongside a detailed clinical interview. The process is collaborative and person-centred, designed to help you feel comfortable and understood throughout.

How long will it take?

We don’t commit to fixed timeframes, as each person’s journey depends on completing pre-assessment forms and appointments. However, once you book a private assessment, your process can begin within 24 hours.

What does “adheres to NICE guidelines” mean?

It means our assessments follow the standards and clinical procedures recommended by the National Institute for Health and Care Excellence (NICE) for autism diagnosis in adults. This ensures your assessment meets the same quality and safety standards as those used in NHS settings.

Do you understand how autism presents differently across genders?

Yes. Our team receives ongoing professional development in recognising how autism presents across genders, ages, and cultural backgrounds. Many traditional diagnostic criteria were developed around male presentations, which means the signs of autism in women and girls can often be missed. RTN’s clinicians are trained to look beyond the “standard tick boxes” to ensure everyone receives a fair and accurate assessment.

What support is available after diagnosis?

You’ll receive clear recommendations and signposting within your report. You can also access ongoing support through RTN Therapies, which provides tailored Cognitive Behavioural Therapy (CBT) and emotional regulation work for neurodivergent adults.

Can I pay for my assessment in installments?

Yes. Flexible payment options are available via Klarna, allowing you to spread the cost of your assessment.

Contact Us

We help create a world where every unique mind is understood, so everyone can thrive.

Enquiries:

0333 772 1164

enquiries@rtnmentalhealthsolutions.com

For feedback, complaints and SAR requests:

feedback@rtnmentalhealthsolutions.com

71-75 Shelton St, London WC2H 9JQ

For more details about how we look after your data please see our Privacy Policy

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