The Autism Toolbox: Diagnosis

This "Toolbox" brings together advice, local support, services, activities and resources relating to autism. The name toolbox has been chosen to reflect that anyone, with or without an autism diagnosis, parents and professionals can make use of this information which covers various topics. This section is on diagnosis.

Need to increase the size of the text, or change the background colour? This can be done on the accessibility page. This page can also be read aloud and translated using Browsealoud. To do so, start by clicking the grey speaker icon. 

In this section (Jump to)

How to get assessed - Services by age 

Benefits of a diagnosis

Useful Information

Services by Ages (Pathways Buckinghamshire)

 The service you will need to contact for an autism diagnosis and assessment will depend on yours, or your child's age. The only way to receive a diagnosis of Autism is to get a formal assessment from a team of health care professionals. There are a number of online autism tests, but these vary in accuracy and none will be able to tell if you're definitely on the autism spectrum. Here is a break down of these services.




Post-Diagnostic Support

0 to 4

Speak to your nursery setting or GP who will discuss a referral to Community Paediatrics and Child Development Team or the Child Development Team (CDT).

5 to 18          

Speak to your School or College and/or GP who will discuss a referral to The Neurodevelopmental Pathway provided by CAMHS and Paediatrics. 

Parents and Young people can also make a direct referral online. The Neurodevelopmental Pathway is a ‘Single Point of Access for Assessment and Treatment’ for 5 to 18-year-olds. The aim is to ensure that Children Young People with Neurodevelopmental concerns are seen by the most appropriate professional in a timely manner. Neurodevelopmental referrals such as Autism and ADHD are to be submitted via the Single Point of Access Pathway.


  • surgery for SENDCos and any relevant school staff

  • Autism Education Trust (AET) training for schools 

  • free and bespoke training courses 

18 Plus

Speak to your GP who will discuss a referral to The Adult ASD Diagnostic Service runs from the Whiteleaf Centre in Aylesbury.

  • Post-diagnostic appointment to discuss the result

  • The post-diagnostic work will consist of brief courses of treatment, either one to one or in groups, during the six months following diagnosis

  • The Autism Toolbox

  • NAS Buckinghamshire



You can also see your GP to request an assessment. Your GP needs a reason to refer you for diagnosis, so you need to explain why you think you could be autistic and how a diagnosis would benefit you.

Try to give your GP some examples of difficulties you've had in adulthood and childhood in areas such as:

  • speech and communication
  • expressing your feelings and thoughts
  • understanding or relating to other people
  • using your imagination in social situations
  • difficulties in being flexible in your behaviour

Find Your Local GPs (NHS Service Finder)

Getting Diagnosed (NHS Conditions)

  • How to get an assessment
  • You need to be referred for an assessment by someone like a GP or special educational needs (SENCO) staff at your child's school.
  • You may have to wait a few months to get an appointment.

Children and Screening 

Health visitors or GPs may do a ‘screening interview’ called an "M-CHAT" this stands for Modified Checklist for Autism in Toddlers. The results are not a diagnosis, but an indication of whether your child may be autistic.  

Find out more about Diagnosis for Children


Benefits of a diagnosis

The benefits of getting a formal diagnosis of autism can include:

  • It may help you to understand why you may experience certain difficulties and what you can do about them.
  • When the people close to you understand why you may see and feel the world in a different way and find certain things difficult, it's much easier for them to empathise.
  • It may help you to get access to support and benefits.
  • Your employer may be required to make any necessary adjustments.

Find out more about people's experiences of getting a diagnosis from the National Autistic Society (NAS). 


Useful Information

CAMHS single point of access phone line

Right from the Start: a guide to autism in the early years (Ambitious about Autism)

After your child’s diagnosis (National Autistic Society)

Changing from child to adult care