Autism is a lifelong developmental disability that affects how people perceive the world and interact with others. It is characterised by a wide range of conditions including challenges in social communication, repetitive behaviours and distinct strengths and differences, all of which can profoundly influences personal development and interaction.
Central to the experience of autism is the difficulty in social interaction and communication. People with autism often find it challenging to interpret verbal and non-verbal cues such as gestures, facial expressions and tone of voice, which are second-nature to non-autistic people. This can result in misunderstandings and social isolation. Many autistic individuals may prefer to interact in ways that might seem less engaging to others, avoiding eye contact or physical contact due to discomfort or misunderstanding of social norms.
Autistic people might struggle with the give and take of conversation, not recognising subtle expressions of emotion or intentions in others. They may also take language literally, missing humour or metaphorical meanings intended by the speaker, leading to confusion or distress.
Autism is also characterised by repetitive behaviours and stringent adherence to routines, which provide a sense of order and predictability. These can include physical rituals like lining up objects, repeating certain phrases or needing to follow a specific routine. Deviations from these routines or encountering unexpected changes can cause significant anxiety and distress.
For many on the autism spectrum, routines and repetition serve as anchors that help to off-set the overwhelming nature of their sensory environments. This need for predictability can result in strict routines that, if disrupted, may lead to severe stress and difficulty adjusting. Similarly, repetitive physical behaviours or ‘stimming’ such as hand-flapping, rocking or repeating sounds or words help in managing sensory overload and providing self-soothing mechanisms.
People with autism often experience atypical sensory responses. This can include under-sensitivity or an exaggerated sensitivity to sensory stimuli like light, sound, touch and taste. These sensory differences can significantly influence their social interactions, emotional well-being and overall participation in daily activities.
Autistic people may find everyday environments challenging due to sensory overload. Loud noises, bright lights or certain textures can be unbearable leading to avoidance of certain places or activities. Creating a supportive environment that acknowledges these sensitivities will help people with autism to function more comfortably and effectively.
Managing sensory overload often involves strategies such as reducing exposure to distressing stimuli, using sensory aids like noise-cancelling headphones or integrating calming activities throughout the day. Understanding and respecting these needs can greatly improve the quality of life for someone with autism.
Despite the challenges, autism also comes with a range of unique strengths and talents. Many people with autism possess exceptional abilities in areas such as memory, art, music, mathematics and detailed understanding of complex systems. These talents often correlate with their intense interests which can provide profound satisfaction and even professional avenues.
The focus and depth of interest that many autistic people show can lead to significant achievements and expertise in specific fields. Educational and vocational programmes that harness these interests can lead to successful careers and fulfilling lives. It is important for society to recognise and value the diverse contributions of autistic individuals, adapting educational and professional environments to support their needs and talents.
A comprehensive diagnostic assessment for autism can be the first step towards understanding and embracing a person’s condition, leading to improved support and an enhanced quality of life.
At ADHD Health Clinic, we recognise the profound impact that a clear and professionally delivered diagnosis can have. For many adults, receiving an autism diagnosis is a turning point – it helps reframe past experiences, guides future decisions, and enables access to appropriate adjustments in both personal and professional life.
Our assessments are conducted exclusively online for convenience and accessibility, with each case reviewed by a qualified Multi-Disciplinary Team (MDT). This approach ensures diagnostic accuracy and is fully compliant with NICE guidelines, the national standard for autism assessments in the UK.
A diagnosis can help:
If you or someone you care about may be autistic, an assessment can be the first step towards a more supported and empowered life.
Our clinicians offering Autism (ASD) Assessments
GMC Registered Consultant Child and Adolescent Psychiatrist
NHS Experience:
Yes
Experience:
Consultant Child and Adolescent Psychiatrist with over a decade of mental health experience, including specialist NHS training at Great Ormond Street Hospital and the Royal London Hospital, with expertise in complex child and adolescent presentations, autism assessment, and family-centred care.
Specialities:
Child and Adolescent Mental Health, Autism, ADHD, Complex Presentations, Anxiety and Mood Difficulties, Interpersonal Psychotherapy (IPT), Family and School-Based Formulation, NICE-Guided Psychiatric Care.
Assessment Types:
Child ADHD Assessments and Child Combined Assessments
Assessment Format:
Online Consultation; and In-person Consultation (Marylebone Clinic)
Availability:
All assessments on Tuesday
Languages Spoken
English
GMC Registered Consultant Neurodevelopmental Psychiatrist
NHS Experience:
Yes
Experience:
Consultant Neurodevelopmental Psychiatrist, multi-award-winning author and international speaker including 7x TEDx talk presentations. Extensive experience leading NHS ADHD and neurodevelopmental services, driving digital innovation, and managing complex adult neurodiversity pathways.
Specialities:
Adult ADHD; Autism Spectrum Disorder; AuDHD (co-occurring Autism and ADHD); Neurodevelopmental Conditions; Complex Adult Mental Health
Assessment Types:
Adult Autism Assessments; Adult ADHD Assessments, Combined Adult Autism & ADHD Assessments
Assessment Format:
In-person Consultation (Marylebone Clinic)
Availability:
All assessments on Monday, Wednesday, Thursday & Saturday
Languages Spoken
English, Urdu, Hindi, Pashto, Punjabi, Saraiki
Chartered Psychologist
Experience:
Chartered Psychologist with over 15 years’ experience in the assessment, treatment, and management of complex psychological needs
Specialities:
Autism Spectrum Disorder; ADHD; Personality Disorders; Trauma; General Mental Health; Cognitive Ability; and Risk Assessment
Assessment Types:
Child Autism Assessments; Combined Child Autism & ADHD Assessments; Adult Autism Assessments
Assessment Format:
Online Consultation Only
Availability:
All assessments Monday to Friday
Languages Spoken
English
Assistant Psychologist
NHS Experience:
Yes
Experience:
Assistant Psychologist with NHS experience supporting multidisciplinary autism assessments, diagnostic reporting and formulation. Experienced in ASD, ADHD, trauma-related difficulties and cognitive functioning, with a compassionate, trauma-informed approach.
Specialities:
Autism, ADHD, Cognitive Functioning, Trauma-Related Difficulties, ADI-R Assessment, Mental Health, Risk Assessment and Psychological Formulation.
Assessment Types:
Child Autism Assessments; Combined Child Autism & ADHD Assessments
Assessment Format:
Online Consultation Only
Availability:
All assessments Saturday
Languages Spoken
English
Consultant Psychiatrist
NHS Experience:
9+ years within NHS mental health services
Experience:
Over 14 years’ experience across CAMHS. Extensive experience in specialist ADHD and neurodevelopmental assessments for children and young people, including complex presentations and co-existing mental health needs.
Specialities:
Child and Adolescent Mental Health, ADHD, Neurodevelopmental Conditions, Anxiety, Depression, Emotional Dysregulation, Behavioural Difficulties, Psychosis and Trauma-Related Difficulties.
Assessment Types:
Child ADHD Assessments; Child Combined Assessments
Assessment Format:
Online Consultation
Availability:
All assessments on Monday, Tuesday, Wednesday, Thursday, Saturday & Sunday
Languages Spoken
English
Neurodiversity Specialist
NHS Experience:
19+ years
Experience:
Neurodiversity Specialist in Private sector and NHS as a nurse consultant and mental health clinical nurse with specialism in child and adult mental health and eating disorders, forensic mental health and looking after children and adult with severe and enduring mental health issues.
Specialities:
Autism; ADHD; Personality Disorders; Trauma; General Mental Health; Cognitive Ability; and Risk Assessment and Management, CAMHS coaching and mentoring
Assessment Types:
Child Autism Assessments; Child ADHD Assessments, Combined Child Autism & ADHD Assessment
Assessment Format:
In-person Consultation (Marylebone Clinic)
Availability:
All assessments on Monday, Tuesday, Wednesday, Thursday & Saturday
Languages Spoken
English, Ndebele and Shona
GMC Registered Consultant Child & Adolescent Psychiatrist
NHS Experience:
Yes
Experience:
10+ years of specialist experience supporting children, adolescents and families across NHS and private healthcare, with particular expertise in neurodevelopmental assessments, complex clinical formulation, and holistic, evidence-based care.
Specialities:
Child & Adolescent Mental Health, ADHD, Autism Spectrum Disorder, Neurodevelopmental Conditions, Complex Presentations, Emotional and Behavioural Difficulties, Holistic Assessment.
Assessment Types:
Child ADHD Assessments; Child Autism Assessments; Child Combined ADHD + Autism Assessments
Assessment Format:
Online Consultation
Availability:
All assessments on Monday and Thursday
Languages Spoken
English; Italian; Romanian
GMC Registered Consultant Psychiatrist
Registered with the following insurance companies:
Experience:
Over 10 years as a Consultant Psychiatrist with extensive leadership roles and clinical expertise in neurodevelopmental disorders, substance misuse, and complex psychiatric conditions.
Specialities:
Autism Spectrum Disorder; ADHD; Substance Misuse Disorders
Assessment Types:
Adult Autism Assessments; Adult ADHD Assessments, Combined Adult Autism & ADHD Assessments
Assessment Format:
Online Consultation
Availability:
All assessments Monday to Friday
Languages Spoken
English, Malay, Sarawakian, Tamil
GMC Registered Consultant Child and Adolescent Psychiatrist
Experience:
CCT-qualified Consultant Child and Adolescent Psychiatrist with extensive experience across specialist CAMHS services in London, including senior clinical leadership within neurodevelopmental pathways and multidisciplinary team (MDT) working.
Specialities:
Child ADHD Assessments, Neurodevelopmental Psychiatry, ADHD and Co-existing Difficulties, Multidisciplinary (MDT) Assessment, Treatment Planning and Recommendations, SEND and Multi-agency Working.
Assessment Types:
Child ADHD Assessments; Child Combined Assessments
Assessment Format:
Online Consultation; and In-person Consultation (Marylebone Clinic)
Availability:
All assessments on Friday
Languages Spoken
English
GMC Registered Consultant Psychiatrist
NHS Experience:
21 years in general adult psychiatry
Experience:
18 months experience in Private Practice in ADHD and Autism Assessments.
Specialities:
Adult ADHD, Adult Autism assessments, CAMHS ADHD and Autism assessments, Mood and Anxiety Disorders, OCD, Bipolar Disorder, Psychosis and Schizophrenia, Substance Misuse, Mental illness during pregnancy and post-partum.
Assessment Types:
Adult ADHD Assessments, Adult Autism Assessments, Adult Combined Assessments
Assessment Format:
Online Consultation; and In-person Consultation (Edinburgh Clinic)
Availability:
All in-person Consultation on Saturday and Sunday. Online Consultations weekdays.
Languages Spoken
English, Tamil
GMC Registered Consultant Psychiatrist
Registered with the following insurance companies:
NHS Experience:
Extensive work in the NHS
Experience:
18+ years in psychiatry including forensic settings
Specialities:
Adult ADHD, Autism, Personality Disorders, Complex Trauma, Neurodevelopmental Conditions
Assessment Types:
Adult ADHD Assessments, Combined Adult Autism & ADHD Assessments
Assessment Format:
Online Consultation Only
Availability:
All assessments on Friday
Languages Spoken
English, Italian
Clinical and Educational Psychologist
Experience:
HCPC Registered Clinical and Educational Psychologist with over 20 years’ experience across education, mental health and psychological services in the UK, Brazil and Italy. Experienced in psychological assessment, therapeutic intervention, consultation and multidisciplinary support for children, young people, adults and families.
Specialities:
Autism, ADHD, Neurodevelopmental Conditions, Anxiety, Depression, Trauma, Emotional Regulation, School Attendance Difficulties, Psychological Formulation and Family Support.
Assessment Types:
Child Autism Assessments and Child Combined Assessments
Assessment Format:
In-person Consultation (Marylebone Clinic)
Availability:
All assessments on Tuesday & Wednesday
Languages Spoken
English, Italian, Portuguese
ADHD Health Clinic is not a crisis service. If you are experiencing a medical emergency, call 999 immediately. For urgent medical help that is not life-threatening, contact NHS 111.
For non-urgent enquiries during working hours, you can reach our admin team at admin@adhdhealthclinic.co.uk.
Dr Sai Achuthan’s new book, Unmasking Autism: The Cross-Cultural Revolution in Adult Assessment, redefines how autism is understood and diagnosed, drawing on decades of cross-continental clinical expertise.
Dr Achuthan is now available for assessments through ADHD Health Clinic:
All our Doctors are Consultant Psychiatrists
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