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Articles > Understanding Autism & Diagnosis
By Peter J Clark
For many adults, the idea that they might be autistic can be a gradual realisation, a question that grows louder over time. Perhaps you have always felt slightly out of step with the world around you, found social situations confusing and exhausting, or recognised similar traits in yourself after a child in your family was diagnosed. Whatever the reason, considering an autism diagnosis in adulthood is a significant step on a journey of self-discovery.
This article aims to guide you through the process of seeking a formal autism diagnosis as an adult in the UK. We will explore the reasons why people seek a diagnosis, the practical steps involved, what the assessment entails, and the potential impact of receiving this new understanding of yourself.
Why might a person, after years of navigating the world, decide to seek an autism diagnosis? The reasons are deeply personal and incredibly varied. For many, it is about finding an answer to a lifelong feeling of being different. Adults often seek diagnosis after experiencing persistent difficulties in social relationships or professional environments, struggling to understand why they find these areas so challenging when others seem to manage them with ease.
Some people are prompted to investigate after their own child is diagnosed, recognising familiar traits and experiences in themselves. For others, the motivation is to finally understand specific aspects of their personality, such as intense sensory sensitivities, a deep need for routine, or the ability to focus with incredible passion on specific interests. Ultimately, it is often a search for a framework to make sense of a lifetime of experiences, a quest for self-understanding and validation.
If you have decided to pursue a formal diagnosis, there are two main pathways in the UK: through the NHS or privately. Here's how you can get started:
For most people, the first port of call is their GP. Your GP cannot diagnose autism, but they are the gateway to a referral for a specialist assessment on the NHS. To make this appointment as effective as possible, it is wise to prepare beforehand. Consider writing a list of the specific reasons why you think you might be autistic. Think about examples from all stages of your life - your childhood, school years, and adult life - that align with autistic traits. This could include challenges with communication, social interaction, sensory issues, routines, and interests. If you feel comfortable, you could also ask a close friend or family member if they have noticed any of these signs in you. Having this information written down can help you communicate your concerns clearly and ensures you do not forget important points during the appointment.
If your GP agrees that an assessment is appropriate, they will refer you to your local specialist autism assessment service. It is important to be aware that, unfortunately, waiting lists for NHS adult autism assessments can be very long, sometimes lasting for several years depending on your location. While you are waiting, you can still seek information and support from reputable organisations like the National Autistic Society.
Due to the long NHS waiting times, some people choose to seek a private assessment. This is a much faster option, but it comes at a significant financial cost. A private assessment can provide the same formal diagnosis as an NHS one. If you consider this route, it is vital to ensure you choose a reputable clinician or service. You should look for a qualified professional, such as a clinical psychologist or psychiatrist, who has extensive experience in diagnosing autism in adults. They should be registered with a professional body like the Health and Care Professions Council (HCPC).
Whether through the NHS or privately, a comprehensive autism assessment is a detailed process. It is not a quick test but a thorough exploration of your life experiences and developmental history. The assessment will likely include several components:
The clinician will conduct in-depth interviews with you, asking questions about your entire life. This will cover your early childhood development, school experiences, friendships, relationships, and work history. They are looking to build a picture of your development and see if there is evidence of autistic traits across your lifespan.
You may be asked to fill out one or more questionnaires, such as the Autism Spectrum Quotient (AQ) or the Empathy Quotient (EQ). These are screening tools that help gather information about traits associated with autism, but they are not used to diagnose in isolation.
With your consent, the clinician may ask to speak with someone who knew you well as a child, such as a parent, carer, or older sibling. This is because autism is a lifelong condition, and information about your early development is very important for an accurate diagnosis. Old school reports can also be very helpful, as they might contain comments like, "Emily needs to learn not to be distracted by noise", which can indicate early signs.
The assessment will also involve the clinician observing and interacting with you, paying attention to your communication style and social interaction.
The goal is to gather enough information to see if your experiences and characteristics meet the formal diagnostic criteria for an autism spectrum condition, as outlined in diagnostic manuals like the DSM-5 or ICD-10.
So, what happens after the assessment is over and you have a diagnosis? Receiving an autism diagnosis in adulthood can be a profound and life-changing experience, often bringing a complex mix of emotions.
Many adults report an overwhelming sense of relief and validation. Lifelong feelings of being different, of not quite fitting in, or of struggling with things others find simple, finally have an explanation. It can answer a fundamental question: "Why am I like this?". This new understanding can lead to a powerful sense of self-acceptance and self-compassion.
A diagnosis often prompts a re-evaluation of your past. You might look back at difficult social situations, past relationships, or career challenges through a new, more understanding "autistic lens". This can be incredibly healing, but it can also bring moments of sadness or grief for the struggles you endured without understanding or support.
Beyond the emotional impact, a formal diagnosis can have practical benefits. It provides you with the language and framework to better understand and articulate your own needs. It can also be the key to accessing tailored support, whether that is specific therapies, community groups, or mentoring schemes. In the workplace, a formal diagnosis is essential for requesting reasonable adjustments under the Equality Act 2010, such as a quieter working space or clearer communication from managers.
Seeking an autism diagnosis as an adult is not about acquiring a label. It is about gaining a vital piece of self-knowledge that can empower you to understand your past, navigate your present, and build a future that is more authentic and accommodating to your needs.
This is the beginning of a new chapter - one that is filled with greater self-awareness, acceptance, and the right kind of support to help you live your life to the fullest.
Copyright ©2025 Peter J. Clark T/A Autism Info Center. All rights reserved worldwide. This information may not be copied, reproduced, excerpted, stored, indexed or distributed without the express written permission of the publisher, author, and copyright holder.