Autism Assessment & Diagnosis for adults

Quick summary

  • Specialist adult autism assessments
  • Multi-disciplinary, NHS and NICE-compliant approach
  • Gold-standard tools (ADI-R, ADOS-2)
  • Clear diagnosis with detailed report
  • Practical recommendations and ongoing support

On this page

Do You Think You Might Be Autistic?

Many adults seek an assessment because they:

  • Feel “different” or misunderstood
  • Find social situations difficult or exhausting
  • Prefer routine and predictability
  • Experience sensory sensitivities
  • Have struggled with anxiety or relationships

What is Autism (ASC)?

Autism Spectrum Condition (ASC) is a lifelong neurodevelopmental condition that affects:

  • Social relationships
  • Communication
  • Behaviour and flexibility

Key Points

  • Autism exists on a spectrum
  • It can present differently in each person
  • It often appears differently in men and women
  • Many people are diagnosed later in life​

👉 A formal assessment is the only way to know for sure—and can bring clarity and understanding.

Why Consider a Diagnosis?

A diagnosis can help you:

  • Understand yourself and your experiences
  • Make sense of past challenges
  • Access appropriate support and services
  • Improve relationships and communication
  • Request reasonable adjustments at work or education

  • It can also help others better understand your needs.

Is It Worth Getting Diagnosed?

Many people find that a diagnosis:

  • Provides clarity and validation
  • Corrects previous misdiagnoses
  • Helps access the right support
  • Improves confidence and self-understanding

How is Autism Diagnosed?

We follow best practice guidance from the National Institute for Health and Care Excellence (NICE) and use gold-standard tools.

Common Signs in Adults

1. Social Relationships

  • Difficulty understanding what others think or feel
  • Anxiety in social situations
  • Difficulty making or maintaining friendships
  • Preference for being alone
  • Difficulty with personal space
  • Strong need for routine

2. Communication

  • May appear blunt, direct, or uninterested (unintentionally)
  • Difficulty expressing or identifying emotions
  • Taking language literally
  • Repetition of words or phrases (echolalia)
  • Avoiding eye contact

3. Emotional Understanding & Behaviour

  • Difficulty adapting communication style to situations
  • Sensory sensitivities (noise, light, textures, etc.)
  • Rigid thinking or behaviour patterns
  • Over- or under-reacting emotionally

Other Common Traits

  • Intense or focused interests
  • Repetitive behaviours
  • Difficulty coping with change
  • Over- or under-sensitivity to sensory input

Important to Know

Having these traits doesn’t necessarily mean that you are autistic.

Similar behaviours can also be linked to:

  • Anxiety
  • Learning difficulties
  • Trauma or life experiences

👉 A professional assessment helps clarify the cause and identify appropriate support

Assessment Process (Overview)

  • Questionnaires completed by you and someone who knows you well
  • 90-minute clinical interview
  • Decision made on whether full assessment is appropriate

  • In-depth exploration of your developmental history
  • Use of tools such as ADI-R
  • Usually completed over two sessions

  • Structured assessment of communication and interaction
  • Conducted by a specialist clinician

  • All information reviewed by the team
  • Diagnostic decision made
  • Comprehensive report prepared

  • Clear explanation of results
  • Opportunity to ask questions
  • Personalised recommendations discussed
  • Final report provided

  • Follow-up sessions available
  • Practical strategies for daily life
  • Guidance for work, relationships, and wellbeing

Support After Diagnosis

It’s common for many adults with autism to experience mental health and wellbeing challenges such as:

  • Anxiety
  • OCD
  • Depression and low mood
  • Relationship issues
  • Low self-esteem
  • Trauma-related difficulties

Support can include

  • Therapy and psychological support/coaching
  • Communication and social skills strategies
  • Workplace or education adjustments
  • Practical coping strategies

👉 While there is no “cure,” the right support can significantly improve quality of life.

Key Takeaways

  • Autism is lifelong—but understanding it can be life-changing
  • Many adults are diagnosed later in life
  • A diagnosis provides clarity, not just a label
  • Support can make everyday life easier

Next Step

If you think you may be autistic, a professional assessment is the most reliable way to find out.  We provide a supportive, respectful, and thorough process to help you gain clarity and move forward with confidence.

We’re here to guide you through every step—clearly, sensitively, and without pressure.

READY WHEN YOU ARE

Find out more

Book an initial screening consultation, or ask us anything first – there’s no pressure, and no jargon. Our referrals team gets back to you within a working day.

“We can usually help – and if we can’t we’ll do our best to point you towards someone who can”
Questa Team

NHS experienced clinicians

Online UK-wide

NICE aligned assessments