ADHD assessments in London
ADHD is a neurodevelopmental condition that can affect focus, energy, and everyday life.
At AG & Co Health, we provide private ADHD assessments in person and online at our South Croydon clinic in London for adults, children, and teenagers.
Whether you're seeking answers for yourself or a loved one, we're here to support you.
In-person ADHD assessment in London
Our London clinic is in South Croydon in the London Borough of Croydon, one of the best-connected areas of South London. Frequent rail links to and from the centre and out towards Surrey make it easier to reach your appointments.
Evening & weekend appointments
We also know that fitting appointments around work and school is not always easy. That's why our London appointments run on weekday evenings and on the weekend, so you can come and see us without taking a day off or removing your child from lessons.
If travelling does not suit you, an online ADHD assessment is available instead, delivered remotely and suitable for people outside London. The process, the diagnostic tools, and the report are all the same. You take part from home.
Why choose private for an ADHD Assessment in London?
NHS ADHD services are under significant pressure, and thousands of children and adults across the UK are currently waiting for life-changing ADHD assessments and treatment plans, with some NHS waits starting from 18 months to over 4 years.
At AG & Co Health, we offer private ADHD support from our Croydon clinic to help more people access person-centred ADHD care. You don't need a doctor's referral for our private assessments, and they are often available within 2 to 4 weeks.
Assessments are led by ADHD specialist Gurmat Khangura, who has spent 15 years in NHS mental health and neurodevelopmental services. He is trained in modern diagnostic assessment tools, and his doctorate looks at both autism and ADHD, so overlapping conditions are familiar ground.
A comprehensive assessment with AG & Co Health includes:
- An initial consultation to learn more about your experiences that brought you here.
- A detailed clinical interview to assess your developmental history, daily functioning, and whether ADHD symptoms are present.
- Input from parents, carers, teachers, or other close peers where appropriate, including questionnaires where relevant.
- Recognised diagnostic tools and clinical judgement to assess whether ADHD is present and distinguish it from other mental health conditions or overlapping difficulties.
- A written report, usually provided within 2 to 4 weeks after assessment, setting out our findings and recommendations for managing ADHD.

Gurmat Khangura
Founder of AG & Co
We will then set some time to talk through the outcome with you. If we have made an ADHD diagnosis, we'll discuss what it means for you with a comprehensive approach tailored to your specific needs.
Our recommended next steps may include ongoing support, workplace or school adjustments, psychological therapy, and, where appropriate, discussion of stimulant or non-stimulant medication to help reduce symptoms such as impulsivity, alongside evidence-based strategies for ADHD treatment.
Every assessment follows the DIVA (Diagnostic Interview for ADHD in Adults) and the DSM-5 criteria using an evidence-based approach in line with NICE guidance. Our tailored treatment plans follow recognised UK clinical guidelines, so you receive expert care grounded in recognised standards.
Which areas of London
do we cover?
Our clinic is based in Croydon, making it particularly convenient for people living across South London. We are easily accessible from Croydon, Bromley, Sutton, Merton, Kingston, Wandsworth and Lambeth, as well as neighbouring areas of Surrey.
However, you do not need to live locally to use our services. We regularly welcome people who travel from further afield for appointments and are happy to discuss whether an in-person or online appointment would suit you best.
Our online assessments also allow us to provide professional support wherever you live, so distance does not have to be a barrier to getting the help you need.
What is ADHD?
ADHD is a neurodevelopmental condition that shapes the way the brain manages attention, energy levels, and impulses. People with ADHD can find it more challenging to follow the social standards of everyday life, at work, school, home, and in relationships.
ADHD clinically stands for Attention Deficit Hyperactivity Disorder, although we prefer to say condition, as it is simply a difference in how the brain works, not a medical problem that needs correcting. People with ADHD have nothing to be ashamed of. With the right support, they can live life in a way that helps them enhance daily life and improve focus.
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What are the signs of ADHD in adults?
ADHD in adults can go undiagnosed for years, especially for people who found ways to mask their ADHD symptoms in school. For many adults, these problems persist into adulthood and only become more noticeable after a long period of coping, when the demands of work, study, or family life grow.
Experiences that lead people to consider an adult ADHD assessment:
- Finding it hard to hold attention on tasks that feel unrewarding, while focusing intently on tasks that are interesting
- Struggling to manage time or judge how long a task will take
- Having trouble relaxing or switching off at night
- Acting or speaking before thinking things through
- Difficulty regulating emotions
- Planning, admin, and organisation taking more effort than they appear to for other people
- Being forgetful with everyday tasks, appointments, or routine admin
- Frequently being late because of time-management or executive-function difficulties
What are the signs of ADHD in children?
For many children, ADHD is often noticed first at school, where sitting still, following multi-step instructions, and concentrating on tasks are part of every day.
Parents may notice their child:
- Finds it hard to focus on homework or other tasks that do not hold their interest
- Moves around frequently, or finds staying still uncomfortable
- Answers before a question is finished, or finds waiting their turn difficult
- Struggles to follow instructions that have multiple steps
- Has strong emotional responses that take a while to settle
- Appears to manage at school, then finds things much harder at home
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FAQs about our private ADHD assessments in London
How do I know if I need a private ADHD assessment in London?
It's really about how you feel and whether you think you could benefit from a diagnosis. A diagnosis can be important because it helps explain whether ADHD is affecting daily life and helps distinguish it from other difficulties. If ADHD keeps coming to mind when you think about your own life or your child's, and it is affecting work, school, relationships, or wellbeing, you may benefit from seeking support. We offer a free consultation to help you explore whether an assessment is the right next step without the pressure to commit.
What happens during a private ADHD assessment?
Our private ADHD assessments are held with our founder and lead clinician, Gurmat Khangura. After an initial consultation to learn about your experiences and how we can help you, you'll be asked to complete a questionnaire and a detailed review. This covers developmental history, current experiences, and the impact of symptoms on daily life. We use recognised diagnostic tools as well as clinical judgement, and where it's beneficial, we'll gather information from parents, carers, or teachers. Our top priority is your comfort and safety, and we'll happily make any adjustments to ensure your needs are met.
Can adults be diagnosed with ADHD?
Yes. We have experience supporting people as young as 5 and have worked with many adults and elderly people too. ADHD is a lifelong condition, and many people reach their thirties, forties, and even beyond that before they seek an ADHD assessment. If you're an adult curious about ADHD, we can look at your experiences now and trace them back through your childhood.
Do I need a GP referral for a private ADHD assessment?
No. You can book directly with us online. It may be helpful to tell your GP anyway to ensure your medical history is accurate, to help with any future NHS support or shared care you may need, and in case local services require a referral letter or later refer you onward for ongoing treatment.
How long does a private ADHD assessment process take?
Our private ADHD assessment usually takes a few hours, but the full process can vary depending on your circumstances. Some assessments involve more than one appointment to build the full picture, but we can give you a more accurate estimate during the initial consultation.



