What Happens at an ADHD Assessment

If you have an ADHD assessment coming up, or you are deciding whether to arrange one, knowing what actually happens in the room reduces a lot of unnecessary anxiety. This article walks through the standard structure of an adult or paediatric ADHD assessment in the UK, what the clinician is doing at each stage, and what to expect in the weeks afterwards.

Before the appointment

Most NICE-aligned services send paperwork in advance. This typically includes:

• A clinical history form covering current symptoms, medical history and family history
• One or more screening questionnaires (often the ASRS or BAARS-IV for adults, or the SNAP-IV or Conners for children)
• A request to provide developmental information, often through school reports, old reports cards or a parent or sibling informant where possible
• Sometimes a request to complete an online screen first; our online ADHD screening tool is an example

Completing these honestly and in detail makes the appointment more productive. The clinician reads them in advance and uses them to focus the conversation.

The assessment itself

NICE NG87 sets the UK standard: a thorough clinical interview by a clinician with training and experience in ADHD ^[1]. The typical adult assessment runs two to three hours, sometimes split across two sessions. The paediatric equivalent runs slightly differently, with more direct involvement of parents and information from school.

The interview usually moves through three or four main sections.

Current symptoms

The clinician asks about the past six to twelve months. The questions are specific, not generic: instead of "do you struggle with attention", they ask for examples of when, where and how the difficulty shows up. They are looking for evidence that the difficulties are present, persistent and affect more than one area of life.

Expect questions about work or school, home, relationships, finances, driving, sleep, exercise and self-care. The breadth of the questioning surprises some people. ADHD does not stay neatly inside one part of life.

Developmental history

This is the part many adults find most emotionally significant. The clinician is establishing whether the pattern dates back to childhood, which DSM-5-TR requires for an ADHD diagnosis ^[3]. They will ask about:

• Early school years, including reports, friendships and behaviour
• Secondary school, including academic performance relative to ability
• Family history of ADHD and other neurodevelopmental conditions
• Significant childhood events, including illness, family disruption and trauma

If you can bring old school reports, end-of-year teacher comments, or memories from a parent or sibling, the developmental section is much easier to complete.

Differential and co-occurring conditions

ADHD overlaps with several other conditions. The clinician will ask about anxiety, depression, sleep, autism traits, eating, substance use, trauma and physical health ^{[1, 4]}. This is not because they doubt the ADHD question; it is because a good assessment looks at the whole picture, not only the question you arrived with.

Structured tool, where used

For adults, the most common structured tool is the DIVA-5: a semi-structured interview covering the DSM-5 criteria with concrete examples for adulthood and childhood ^[2]. The clinician walks through each diagnostic criterion in turn, asking for specific examples.

For paediatric assessments, structured rating scales completed by parents and teachers (Conners, SNAP-IV, Vanderbilt) and sometimes a direct observation contribute. NICE also recommends information from school as standard ^[1].

Objective testing, where used

Some adult and paediatric assessments include an objective attention test such as QbCheck, which measures attention, impulsivity and motor activity in a controlled computer-based task. NeuroFX uses QbCheck in approximately 10 to 15 percent of cases where the clinical picture would benefit from it. These tests add information rather than confirm or rule out ADHD on their own.

How the diagnosis is made

The clinician integrates the interview, developmental history, informant information and any structured tools. They check the picture against DSM-5-TR or ICD-11 criteria and against the alternative explanations they considered ^[3].

The diagnostic options are:

• ADHD confirmed, with the presentation specified (inattentive, hyperactive-impulsive, or combined)
• ADHD not confirmed, with an explanation of what the difficulties may reflect and what further investigation might help
• Further information needed before a diagnostic decision can be made

In NeuroFX assessments, an outcome conversation is typically offered within 48 hours of the final session, with a full written report within 7 to 14 days.

After the assessment

If ADHD is confirmed, the report covers:

• The diagnosis and the evidence supporting it
• Co-occurring conditions identified
• Treatment options, including medication where appropriate
• Practical next steps, including workplace or school adjustments
• Information about access to medication and any onward referrals

If ADHD is not confirmed, the report explains what the difficulties may reflect and what further investigation or support might help. A negative diagnosis is not nothing: it usually clarifies the picture and points to the next useful step.

What this looks like for children

Paediatric assessment at NeuroFX is structured for the age and stage of the child. Parents play a central role, and information from the child's school is part of the standard pathway. Direct interview and observation of the child is age-appropriate. The same NICE standard applies. Private paediatric ADHD assessment is available for children aged 6 and upwards.

What this means in practice

• Treat the paperwork as part of the assessment. Honest, specific completion makes the appointment more productive.
• Bring evidence. Old school reports, parent or sibling memories, photos and notes from childhood. Specificity helps the clinician see the lifelong pattern.
• Be ready to talk about how you function across the whole week, not just in your strongest setting. The home picture matters as much as the work one.
• Expect the developmental section to be emotionally significant. Many adults find this the most challenging part of the process.
• The report is not the end of the pathway. The first three months after diagnosis are when the practical work happens.

When to speak to a professional

If you are recognising the pattern in yourself or your child, NHS routes start with GP referral; Right to Choose in England is the same first conversation. NeuroFX offers private adult ADHD assessment and paediatric assessment from our Bedford clinic. Seek same-day help via 111 (or 999 in an emergency) for any mental health crisis.

Sources

1. NICE. Attention deficit hyperactivity disorder: diagnosis and management. NG87. National Institute for Health and Care Excellence. https://www.nice.org.uk/guidance/ng87
2. Kooij JJS, Bijlenga D, Salerno L, et al. Updated European Consensus Statement on diagnosis and treatment of adult ADHD. European Psychiatry. 2019;56:14-34.
3. American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR). Washington, DC: American Psychiatric Association Publishing; 2022.
4. Faraone SV, Banaschewski T, Coghill D, et al. The World Federation of ADHD International Consensus Statement: 208 evidence-based conclusions about the disorder. Neuroscience and Biobehavioral Reviews. 2021;128:789-818.