What to Expect at Your ADHD Assessment
Booking an ADHD assessment is a significant step. Many patients feel anxious about what to expect. This guide explains exactly what happens at an ADHD Assessment UK appointment, from the moment you book to the day you receive your report.
Before your assessment: preparation
After booking, you will receive a confirmation email with your appointment details and pre-assessment questionnaires. These questionnaires are an essential part of the assessment process and typically take 30-45 minutes to complete.
The questionnaires you will be asked to complete include a self-report rating scale (such as the Conners Adult ADHD Rating Scale or the Adult ADHD Self-Report Scale), a collateral report form to be completed by someone who knows you well (a partner, parent, or close friend), and a background information form covering your medical history, educational history, and current difficulties.
There are no right or wrong answers on these questionnaires. Honesty is essential for an accurate assessment. Many people worry about appearing to exaggerate their difficulties -- but clinicians are trained to interpret questionnaire responses in context, and underreporting is actually more common than exaggeration.
On the day: what to bring
For your online assessment, you will need a quiet, private space where you will not be interrupted, a reliable internet connection, and your device charged and ready. You do not need to bring any documents, but if you have previous psychological assessments, school reports, or medical records that you think are relevant, you are welcome to share them.
During your assessment: what happens
Your assessment will last approximately 90-120 minutes. It is a clinical interview, not a test. There is no pass or fail.
Your clinician will begin by reviewing your completed questionnaires and asking any clarifying questions. They will then take a detailed clinical history covering your current symptoms and how they affect your daily life, the history of your symptoms (ADHD must have been present since childhood, even if not recognised at the time), your educational history and any learning difficulties, your occupational history and any work-related difficulties, your relationships and social functioning, your mental health history including any previous diagnoses or treatment, and any family history of ADHD or other neurodevelopmental conditions.
Your clinician will also explore whether your symptoms might be better explained by another condition (such as anxiety, depression, autism, or a sleep disorder) or whether another condition co-exists with ADHD. This is an important part of a thorough assessment and does not mean your clinician doubts your symptoms.
After your assessment: the report
Within 5 working days, you will receive a detailed written clinical report. This report will include a summary of your clinical history, the results of the standardised rating scales, the clinical reasoning behind the diagnostic conclusion, a clear diagnostic outcome (ADHD confirmed or not confirmed, and if confirmed, which type), recommendations for treatment and support, and a letter for your GP.
What if ADHD is not diagnosed?
Not everyone who presents for assessment will receive an ADHD diagnosis. If ADHD is not confirmed, your report will explain the clinical reasoning and may suggest alternative explanations or referrals. This is still a valuable outcome -- it provides clarity and helps direct you to the right support. Many patients who do not receive an ADHD diagnosis are found to have anxiety, depression, autism, or another condition that explains their difficulties.
After your report: next steps
Once you have your report, you can share it with your GP to update your medical records and request shared care for medication, use it to access workplace adjustments under the Equality Act 2010, share it with relevant educational institutions if applicable, and use it as the basis for accessing further support services.
Common questions about the assessment
Can I bring someone with me? Yes. Having a trusted person present can be helpful, particularly if they are completing the collateral report.
What if I am nervous? This is completely normal. Your clinician will put you at ease. The assessment is a conversation, not an interrogation.
What if I forget things during the assessment? Your clinician will guide you through the process. If you are concerned about forgetting important information, make notes in advance.