A person with autism viewed from behind standing on an urban street with their back to us.

Adult ASD Assessment and
Diagnosis in the UK

Do you suspect you might have Autism Spectrum Disorder (ASD)?

You're not alone. More than one in 100 people are on the autism spectrum and there are around 700,000 autistic adults and children in the UK. Many adults remain undiagnosed until later in life, leading to challenges in relationships, work, and self-awareness. At Diverse Diagnostics, we offer comprehensive online Adult ASD assessments to help you gain clarity and access the support you deserve.

Not Sure If You Have Autism?

We understand this can be a confusing and emotional time. We approach each person with care and respect, recognizing everyone's unique journey.

Our team offers clarity and support through the diagnosis journey. Take our free ASD test to find out if you are experiencing symptoms of autism.

Understanding Adult ASD

Often thought of as a childhood condition, Autism can persist well into adulthood. While the core characteristics of ASD remain present throughout life, their impact and presentation can differ significantly compared to childhood. Many adults with undiagnosed ASD experience challenges in various aspects of their lives. However, with proper diagnosis and support, individuals with ASD can thrive and achieve their full potential.

Common signs and symptoms in adults may include:

  • Social Interaction:
    Difficulty understanding social cues, challenges with forming and maintaining relationships, social awkwardness.
  • Communication:
    Difficulty with verbal and non-verbal communication, literal interpretation of language, limited range of interests and topics in conversation.
  • Sensory Processing:
    Over-sensitivity or under-sensitivity to sensory stimuli like sounds, textures, and lights, difficulty filtering out background noise.
  • Repetitive Behaviours and Restricted Interests:
    Fixation on specific topics or routines, repetitive movements or behaviours that provide comfort.


The Autism Research Institute lists the following conditions that ASD can simultaneously present with:

The Autism Research Institute lists the following conditions that ASD can simultaneously present with:

  • Learning Disorders: Difficulties with reading, writing, or maths can co-occur with ADHD [Dyslexia, Dysgraphia, Dyscalculia].
  • Seizures: Epilepsy is more common in individuals with ASD compared to the general population. If you notice any unusual changes in behaviour, movement, or awareness, consult a healthcare professional to discuss the possibility of seizures.
  • Dental Issues: Some autistic individuals may have difficulty with oral hygiene routines or sensory sensitivities that make dental visits challenging. Regular dental checkups and discussing any concerns with a dentist are important for maintaining good oral health.
  • Anxiety Disorders: Adults with autism may experience higher levels of anxiety and worry.
  • Sleep Disorders: Trouble falling asleep, staying asleep, or restless sleep can be linked to ADHD.
  • ADHD: 50 to 70% of individuals with autism also present with comorbid attention deficit hyperactivity disorder (ADHD).

Impact of ASD on Adults

  • Mental Health:
    Increased risk of anxiety, depression, and social isolation.
  • Daily Life:
    Difficulty with organisation, planning, and managing daily routines.
  • Relationships:
    Challenges with building and maintaining friendships and romantic relationships.
  • Work/Education:
    Difficulties with adapting to workplace demands, social interactions in professional settings, and transitions.
If you recognise these challenges in yourself, seeking a professional assessment is crucial. Early diagnosis and intervention can empower you to develop strategies for managing ASD symptoms and living a fulfilling life.

What are the benefits of an Adult ASD Assessment?

An Adult ASD diagnosis can be a transformative experience. It offers valuable insights into your strengths, weaknesses, and unique needs, finally providing a long-awaited explanation for feeling different. This empowers you in several ways:

  • Gain self-awareness and understand your strengths and weaknesses.
  • Access support resources and build stronger relationships.
  • and build stronger relationships about treatment and thrive.

To gain these life-changing benefits, a comprehensive Adult ASD assessment is crucial. Diverse Diagnostics offers a convenient online assessment process that leverages the expertise of our team. This assessment provides you with:

  • Evidence-Based Approach:
    Our approach is backed by the latest research and best practices.
  • Family-Centred Care:
    We involve your family for a collaborative and supportive environment.
  • Lifelong Tools:
    Develop coping mechanisms for various life stages and enhance your overall well-being.
  • Medication:
    We prescribe medication for conditions like anxiety, or depression, that occur simultaneously with ASD.

Ready to embark on a journey of self-discovery? Learn more about our online Adult ASD assessment.

Our Adult ASD Assessment Process

We understand the importance of a thorough and accurate assessment. Our process takes place over 8 weeks, ensuring a holistic evaluation:We understand the importance of a thorough and accurate assessment. Our process takes place over 8 weeks, ensuring a holistic evaluation:
  • Initial Assessment:
    Discuss your concerns and experiences with a consultant psychiatrist. A mental health screening is also included.
  • Neurodevelopmental Screening:
    Utilise validated tools and questionnaires to evaluate your cognitive abilities, social functioning, communication, and sensory processing.
  • ADOS Assessment:
    A face-to-face scenario-based assessment conducted by a clinical nurse specialist and neurodevelopmental therapist to observe social communication skills.
  • Diagnostic Feedback:
    Receive a detailed report summarising the findings and diagnosis. A follow-up session with your psychiatrist allows for in-depth discussion and personalised treatment recommendations.


Adult ASD Screening:
A Personalised First Step

Our Adult ASD Screening offers a focused assessment for a preliminary understanding of your ASD profile.
    • Focused Assessment:
      Our assessment provides a clear picture of your ASD, paving the way for effective treatment and improved well-being.
    • What We Explore:
      Social skills, communication challenges, repetitive behaviours, and potential co-occurring conditions like ADHD.
    • Important Note:
      This screening is not a complete diagnosis, but it offers valuable insights and recommendations for further evaluation if needed.
Cost: £390 | Duration: 1 hour | Outcome:
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