Autism/ADHD Assessment2024-01-31T16:56:02+00:00

Online Diagnostic Assessments for Children and Adults. Autism, ADHD, and Combined Assessments.

No Waiting Lists and a 12-week Turnaround!

The NTI team understands the challenges and barriers that come with the diagnostic process. That’s why we are proud to partner with RTN Mental Health Solutions, who offer a streamlined and efficient diagnostic service, and always ensure a fast turnaround time.

RTN’s diagnostic assessments are completed by UK-based HCPC registered Clinical Psychologists and form part of their multidisciplinary team. These professionals are esteemed members of the British Psychology Society (BPS), recognised by the NHS, and adhere to the NICE Guidelines.

Below is the selection of options available, along with further information to help you make an informed decision including a LIST OF FAQ’S. If you need any further assistance, you can book a FREE CONSULTATION HERE with an NTI expert to help you make the most informed decision. A call back will happen within 24 hours, Monday to Friday.

Adult Autism Assessment


Booking deposit of £115 and remaining balance payable to RTN when the appointment is scheduled.

Adult ADHD Assessment


Booking deposit of £89.50 and remaining balance payable to RTN when the appointment is scheduled.

Adult Combined Assessment


Booking deposit of £215 and remaining balance payable to RTN when appointment is scheduled.

Child Autism Assessment


Booking deposit of £125 and remaining balance payable to RTN when the appointment is scheduled.

Child ADHD Assessment


Booking deposit of £89.50 and remaining balance payable to RTN when the appointment is scheduled.

Child Combined Assessment


Booking deposit of £215 and remaining balance payable to RTN when appointment is scheduled.

Why Get an Assessment?

Understanding and Validation – A formal diagnosis can offer a better understanding of the unique traits and challenges associated with autism or ADHD. It provides validation for individuals and families, helping them make sense of their experiences and access appropriate support.

Access to Support & Resources – A diagnosis opens doors to a wide range of support services, therapies, and resources that can significantly improve the quality of life for Autistic and/or ADHD individuals. It enables access to tailored interventions and strategies that address specific needs.

Advocacy & Accommodations – A formal diagnosis facilitates the advocacy process and helps individuals access accommodations in various settings, including education, employment, and community environments. It ensures that their unique strengths and challenges are recognised and accommodated.

Fast-Track Your Autism and/or ADHD Diagnosis

Skip Waiting Lists and Costly Expenses

For parents of neurodivergent children and neurodivergent adults themselves, the journey to obtain a diagnosis can be incredibly stressful. It often involves long waiting lists, exorbitant costs, and a sense of frustration and overwhelm that can discourage individuals from pursuing the support they need.

At Neurodiversity Training International, we understand the challenges and barriers that come with the diagnostic process. That’s why we are proud to partner with RTN Mental Health Solutions, offering a streamlined and efficient diagnostic service that ensures a fast turnaround time. Our diagnostic assessments are completed by UK-based Chartered Clinical Psychologists who are part of a multidisciplinary team. These professionals are esteemed members of the British Psychology Society (BPS), recognised by the NHS, and adhere to the NICE Guidelines.

Key Benefits of RTN’s Diagnostic Services

Timely Results – Most public sector waiting lists, across the U.K. and across the world – are longer than two years. Some even as much as five years! Recognising the urgency of obtaining a diagnosis is why RTN’s assessments are started within seven days and the diagnostic interview held within twelve weeks or less. Depending on how quickly you return the requested information back to the RTN team, the entire process can be done inside 12 weeks! Some assessments may take longer if they are more complex or there is a delay in getting information back. Efficiency is prioritised without compromising the accuracy and thoroughness of the evaluation.

Affordable Pricing – Clinics can charge as high as £4,000 for a diagnostic assessment and we believe access to diagnosis should not be a financial burden. Each diagnostic service is designed to be accessible, with costs starting from £895. We strive to remove the financial barriers that often hinder individuals from seeking a diagnosis.

Expert Clinical Psychologists – Each assessment is conducted by the multidisciplinary team within RTN Mental Health Solutions that includes Chartered Clinical Psychologists, Psychotherapists, Speech and Language Therapists and Occupational Therapists. Assessments are done in accordance to NICE Guidelines, and are consistent with UK NHS practices. The RTN team possess the knowledge and experience necessary to provide accurate and insightful evaluations.

Multidisciplinary Approach – The RTN team takes a comprehensive approach to the diagnostic process by collaborating with professionals from various disciplines to ensure a thorough evaluation, incorporating different perspectives to provide a well-rounded assessment. By choosing a RTN diagnostic service, you can experience a stress-free and efficient path to obtaining an autism or ADHD diagnosis. We understand the importance of a timely and accurate diagnosis in accessing appropriate support and interventions.

What People are Saying

RTN Mental Health Solutions

So Why Chose RTN?

RTN works with communities and corporates, to ensure individuals can achieve better mental health outcomes, without spending thousands or languishing on waiting lists. In the UK, waiting times for diagnoses can be as long as two years. Private assessments are often financially inaccessible and can have complex pricing structures. RTN provides an affordable and speedy assessment process to ensure Neurodivergent people and their networks can receive the right support.

RTN’s Promise to You

Amanda Hall

Amanda Hall

CPsychol; AFBPsS – Chartered Clinical Psychologist

As an Applied Psychologist in the NHS, I worked in various settings in mental health and learning disabilities and eventually became Head of Psychology in Swansea NHS Trust and then Lead for Psychological Therapies in Abertawe Bro Morgannwg University (ABMU) NHS Health Board.

Dr Charmain Round

Dr Charmian Round

Doctorate in Clinical Psychology (DClinPsy)

Dr Charmian Round is a Chartered Clinical Psychologist with over 25 years’ experience working in the NHS providing assessment, therapy, training, support and consultation to neurodiverse adults and children, their families, support networks and other professionals.

Dr Renata Fialho

Dr Renata Fialho

NHS specialist


Dr Renata Fialho works in an NHS specialist service at the general hospital, having developed extensive experience with post-Covid syndrome, depression, anxiety, emotional difficulties associated with chronic illness, physical persistent symptoms, and functional neurological disorders.

Frequently Asked Questions (FAQs)

Is it possible to speak to someone to help me make a more informed decision?2024-01-31T17:06:10+00:00

We understand selecting the right diagnostic can be a tricky decision so feel free to send a MESSAGE to the NTI team and a prompt call back will be arranged

Can I also book directly with RTN?2024-01-26T21:13:57+00:00

Yes of course! However, to avail of the same discounted prices presented on the NTI website, you need to apply discount code NTI100 at the RTN checkout.

Can anyone get an assessment?2024-01-26T21:14:23+00:00

Any person aged 6 or over can undergo an assessment with RTN provided they are deemed suitable for an assessment at that time.

Will my diagnosis with RTN meet the NICE guidelines?2024-01-26T21:14:56+00:00

RTN follows NICE guidelines, and their clinical psychologists are all HCPC registered. Each clinical psychologist can give a diagnosis as they follow the ICD-11 and DSM-V criteria which is the same as what the NHS uses to meet diagnostic criteria.

What if I’m still unsure as to what assessment to take?2024-01-26T21:15:29+00:00

To help make an informed decision, RTN can use pre-assessment screening tools to identify symptoms you might experience. Note that this is not a diagnosis, but instead an indication of which traits are currently present which can help to inform your decision. Remember, to avail of the same discounted prices presented on the NTI website, you need to apply discount code NTI100 at the RTN checkout.

Can I change from a single assessment to a combined one?2024-01-26T21:17:56+00:00

If you decide to change from a single assessment to a combined assessment (both ASD and ADHD) during the process, then the additional assessment can be added in at any stage. You will be charged the same as if you had selected a combined assessment from the start.

Will my RTN diagnosis be recognised by the NHS?2024-01-26T21:18:26+00:00

Whilst each medical professional and NHS Trust will be different, the vast majority of RTN’s clients have no problems having their report recognised by the NHS. If you struggle with this, then RTN are happy to assist you by speaking to your medical professional to discuss their NICE-compliant assessment methodology in more detail.

Is it possible to spread the cost of the assessment?2024-01-26T21:23:55+00:00

If required, the cost of the assessment can be spread for you through one of the available instalment plans which are at 0% interest.

Why do I need to complete a consent form?2024-01-26T21:24:24+00:00

To ensure compliance with RTN’s Privacy Policy and GDPR requirements, you will be asked to complete a consent form as part of the registration process. You will also be asked for the contact details of all assessment participants. The team will request a summary care record of your medical records as part of the standard data collection process to inform the diagnostic process. For more information on Summary Care Record (SCR), please visit the following:

Do you triage customers before proceeding with assessments?2024-01-26T21:24:46+00:00

Yes. Once RTN has received the client’s summary care report, the team will then follow their triage process which consists of assessing previous/current diagnoses, mental health, wellbeing, and medical history. Should it be deemed necessary RTN will contact your primary and/or secondary mental health care provider for further information.

How do I book an assessment?2024-01-31T16:59:31+00:00

To book an assessment, follow the booking instructions through the NTI website to make a reservation. A member of the RTN team will then be in touch with you to help you through the initial stages of the assessment process. Should you have any questions which you’d like to ask before making a booking, please drop the NTI team an email at and a prompt call back will be arranged if necessary.

How do I complete the questionnaires?2024-01-26T21:25:37+00:00

After reserving a diagnostic, questionnaires will be sent to all relevant parties via email, this will include informants, for example, your child’s school, parents or significant other. The questionnaires are completed online and immediately uploaded to the RTN system upon submission. RTN will require responses to all questionnaires, including any informants, before they can proceed to the diagnostic interview stage. If for any reason you struggle to complete the questionnaires online, please call RTN for further assistance.

Do I need to provide any supporting information?2024-01-26T21:27:50+00:00

Clients are recommended to provide RTN with any supporting information that they think will be beneficial to their assessment. This can include official previous/current medical reports from multidisciplinary teams and previous/current school reports. Evidence of traits/behaviours during a client’s developmental period is crucial to aiding the assessment.

What happens at the diagnostic Interview?2024-01-26T21:28:25+00:00

The RTN team will contact you, and once all questionnaires have been received, they will arrange a time and date to complete the online video diagnostic interview. They have a variety of different practitioners that run these interviews including HCPC registered psychologists and speech and language therapists. The interview will take place via a secure online video platform, and you will be able to see and hear the clinician for the duration of the diagnostic interview.

Each diagnostic assessment varies in time, typically an ADHD interview lasts two hours and an ASD interview may take up to three hours. We recommend allowing up to three hours for the assessment to allow you an opportunity to ask the clinician any questions you may have.

What can I expect in the diagnostic Report?2024-01-26T21:28:46+00:00

The diagnostic report may be up to 15 pages long summarising the information the team has collected from you. The report will contain a summary of the diagnostic interview and the output of the questionnaires submitted. The report will also contain the final diagnostic decision with recommendations for aftercare support.

Can I provide RTN with feedback?2024-01-26T21:29:07+00:00

It is important for RTN to keep improving the quality of their service. As such, they will be sending a short survey for you to complete. They would appreciate your participation and while they love receiving positive feedback, they also welcome any constructive criticism that helps them to improve.

Can you prescribe medication?2024-01-26T21:29:34+00:00

RTN Mental Health Solutions do not prescribe medication as a part of their mental health services. However, they have a partner company called RTN Medical that can provide medication support to their clients. RTN Medical is a separate entity from RTN Mental Health Solutions, but they work closely with them to ensure their clients receive comprehensive care. Their team of mental health professionals will work with you to explore if medication is an appropriate course of treatment and will refer you to RTN Medical if needed.

Need Help Before Deciding On The Right Diagnostic Option For You?
Click HERE to send us a message and we will arrange a call back.

Terms and Conditions Including Payment Plans

1) The deposit paid is non-refundable. After you pay your deposit, you will automatically be connected to a member of the RTN team who will schedule your appointment and initiate the payment terms you selected at checkout.

2) If you choose to pay in instalments, the following options are available:

a) Adult Autism Assessment – £115 deposit and three further payments of £293.

b) Child Autism Assessment – £125 deposit and three further payments of £375.

c) ADHD Assessment – £89.50 deposit and three further payments of £268.50.

d) Adult Combined Autism and ADHD Assessment – £215 deposit and five further payments of £275.

e) Child Combined Autism and ADHD Assessment – £215 deposit and five further payments of £356.

3) The diagnostic assessment report will not be sent to the customer until the final instalment is paid.

4) RTN will provide aftercare recommendations within the diagnostic report. This may include accessing post-diagnostic, ND specialist therapy and/or access to private prescriptions via RTN’s CQC registered, private psychiatric clinic, RTN Medical. These services are not included in the diagnostic assessment cost.

5) Some GPs accept a private diagnostic assessment alone for prescribing ADHD medication, some do not. If you feel medication is part of your treatment plan post-diagnosis, it is worth speaking to your GP before pursuing an ADHD diagnosis. Note that RTN do have a private psychiatric pathway for medication assessment, but this is at a supplementary cost. Further information can be provided upon request.


The diagnostic assessment process covers the distribution and analysis of screening questionnaires, a diagnostic interview with an RTN Clinician, a QbTest (ADHD assessments only), an observational assessment (Child ASD only), a review of the outcomes by one or more members of our multi-disciplinary team and a detailed diagnostic report confirming the outcomes and providing aftercare recommendations. Child ASD and combined assessments also include a post-diagnostic review meeting to discuss the outcomes with a member of the RTN Team.

6) Second opinions, and additional appointments requested by the client, will be billable at a rate of £300 per hour.

7) All diagnostic assessments are carried out online via secure video conferencing software.

8) Assessments are available for anyone aged 6 years or older. RTN will require diagnostic questionnaires completed by informants, such as parents, school, significant other, primary or secondary healthcare providers.

9) RTN has a zero-tolerance policy toward abuse against clinical staff and RTN reserves the right to terminate an assessment without refund.

10) RTN is committed to a rapid turnaround time for assessments, however, this is dependent on the timely submission of questionnaires and forms by our clients and their informants for analysis and processing.

11) RTN triages each client before proceeding with assessments. We reserve the right to decline the request for an assessment in cases where there are clinical complexities that would make the process inadvisable.

12) Please note a Child is defined as a person who is under the age of 18 at the time of booking an assessment.

Neurodiversity Training International is a partner organisation of RTN Mental Health Solutions.


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