FOR ADULTS
An online 2-hour Autism + ADHD Assessment including detailed diagnostic report.
Around 30–40% of adults diagnosed with ADHD or autism may have both conditions, making a combined assessment the most effective way to gain clarity. Our consultant-led, 2-hour online assessment provides a thorough and accurate evaluation, ensuring nothing important is missed. With no GP referral required and everything conducted online, it’s a convenient, confidential and clinically robust way to get the answers you need.
To schedule your assessment, please select a suitable date and time, then follow the instructions to complete your payment. You can choose to pay in full, or take advantage of Klarna’s flexible options, including ‘Buy Now, Pay Later’ and interest free instalment plans.
Next week:
2
appointments
In 2 weeks:
8
appointments
In 3 weeks:
9
appointments
For more appointment times, please use the arrows on the calendar.
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:
Before booking, please check your policy to confirm that this type of assessment is covered. ADHD Health Clinic works with Cigna, Bupa Global, Vitality and WPA. Please note that we do not work with Bupa UK.
Our combined Autism + ADHD assessments are led by consultant psychiatrists with extensive expertise in both conditions and their overlap. Each assessment is guided by NICE standards, ensuring a thorough and clinically reliable process tailored for adults.
Every assessment is conducted online for your convenience and privacy, and includes pre-assessment forms to help us understand your history, experiences and current challenges. The consultation itself lasts two hours and is followed by a detailed diagnostic report, offering clear conclusions and practical recommendations.
For many adults, understanding whether they have autism, ADHD, or both brings transformative clarity. This combined approach can reduce the need for multiple separate assessments, helping you move forward more quickly with the right treatment and support. Our goal is to provide clarity, compassion and confidence as you take this important step.
Our Consultant Psychiatrists offering online Autism and ADHD Assessments
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 and Online Consultation
Availability:
All assessments on Thursday
Languages Spoken
English, Urdu, Hindi, Pashto, Punjabi, Saraiki
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 Only
Availability:
All assessments on Saturday and Sunday
Languages Spoken
English, Malay, Sarawakian, Tamil
Experience:
18+ years in psychiatry, including extensive work in the NHS and 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
“I had a very positive experience with Dr. Sai Achuthan. I tend to write long, detailed descriptions, and I appreciated that he took the time to read everything! He showed genuine empathy and understanding throughout the conversation, which made me feel heard and respected. I felt that he approached my autism case with both professionalism and compassion, and that combination means a lot to me 🙂 Thank you!”
Verified patient
“Dr Sai was brilliant, he explained the process clearly which eased my anxiety. He communicated clearly throughout the appointment and gave me information regarding next steps. I wouldn’t hesitate to recommend him to anyone else seeking an assessment.”
Verified patient
“Dr Achuthan was absolutely brilliant. I was really anxious for my appointment and he made me feel at ease by walking me through the assessment and explaining questions in a way that I could fully understand. The assessment did not feel rushed, I felt like he was completely present and attentive and cared about my experiences. He was the best doctor I have ever had the pleasure of talking to. At the age of 28, I finally felt listened to and understood about the difficulties I have faced my whole life. I received clear guidance regarding any aftercare I may need post diagnosis, including relevant support and potential therapy. My overall experience has been a very positive one. Thank you so much for everything.”
Verified patient
“I was assessed online for autism. I found Dr Achuthan to be reassuring, he kept me informed so I knew what was expected. Questions were clear so I had no difficulties during the assessment despite acute anxiety. He gave me a clear diagnosis and invited questions from me. I would be happy to recommend him as an ASD assessor”
Verified patient
“Dr Achuthan was very thorough and honest before, during and after the assessment and made sure he understood the responses being provided to his questions and queries.”
Verified patient
“Dr Sai was brilliant. I was nervous for the assessment but he was very friendly, understanding, clear, patient, and professional. His friendly manner put me at ease immediately. The whole assessment went very smoothly, all of the questions were clear and easy to answer. Any question I was unsure of, Sai gave examples or happily re-explained, which hugely helped. I felt listened to and didn’t feel rushed or pressured to answer any questions at all. My overall experience was great, everything was explained in lots of detail for me to understand and he was extremely professional, friendly, and understanding. Overall, my assessment with Dr Sai was excellent and i would really recommend him to anyone. Thank you so much for such a positive experience with my assessment, i am very grateful.”
Verified patient
“Sai was absolutely lovely, understanding, professional and kind. Listened to me, was respectful and took me seriously. Could not have ask for a better doctor!! Thanks so much!!”
Verified patient
“Dr Sai Achuthan was great, friendly and also professional, he put me at ease right from the start as I was very anxious about the assessment, it was clear that he had read all the pre assessment forms in depth and he asked many questions to which he then listened patiently to my responses. There were things that Dr Sai Achuthan explained in detail which helped me to understand my thought process better which was very insightful. I would recommend Dr Sai Achuthan to anybody in need of an ASD assessment.”
Verified patient
“He was amazing from start to finish, spoke about his own experiences, made me feel so comfortable, listened to and understood, I’m so happy I chose Dr Sai Achuthan”
Verified patient
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.
