What happens in an adult ADHD assessment

If you’ve never had one, an ADHD assessment can feel like a closed door. Knowing roughly what’s behind it can take some of the worry away.

Every service runs things a little differently. But the main parts come up again and again in guidance from the NHS, NICE and NIMH, and they’re less mysterious than they sound.

A conversation with a specialist

In England, NICE guidance is clear about who makes the diagnosis: a specialist psychiatrist or another appropriately qualified healthcare professional with training and expertise in diagnosing ADHD. The NHS describes the appointment as being with an ADHD specialist, such as a psychiatrist.

The heart of the assessment is talking. NICE describes a full clinical and psychosocial assessment, including discussion about behaviour and symptoms in the different settings of everyday life, and a full developmental and psychiatric history. An international consensus statement from the World Federation of ADHD says ADHD can only be diagnosed by a licensed clinician who interviews the patient.

Expect questions about now and about then. The NHS says the specialist will ask about the history of your symptoms, particularly if they started when you were a child, and how they affected you at school. It lists the areas of life the assessment focuses on: work and education, family and friends, and your medical history, including any mental health issues.

Why so much about childhood? NIMH explains that adults need to have shown symptoms before age 12, so a diagnosis relies heavily on past reports of behaviour.

The assessor is also interested in how much things get in the way. NIMH notes that many people show some of these behaviours some of the time. For adults with ADHD, they’re more severe, frequent and persistent, and interfere with daily life. That’s why real examples, with roughly how often they happen, are worth bringing.

It isn’t an exam. There’s nothing to pass, only your own life, told as honestly as you can.

Other people, records and questionnaires

Guidance also looks beyond your own account. NICE includes observer reports. The NHS says the specialist may want to contact someone who knows you well, such as a family member or close friend, and NIMH says a provider may look at school reports or other childhood records.

Hearing from other people isn’t about doubting you. CHADD, a US ADHD charity, notes that it isn’t to question the person’s honesty, but to gather more information. Not everyone has family to ask or old reports to hand. If that’s you, say so.

You may be asked to fill in questionnaires, sometimes called rating scales. NIMH lists clinical interviews and behaviour rating scales among the things a provider may ask you to do.

They’re tools, not the verdict. NICE guidance calls rating scales helpful added tools, but not enough on their own for a diagnosis. The World Federation of ADHD statement agrees that ADHD cannot be diagnosed by rating scales alone, neuropsychological tests or brain imaging. MedlinePlus puts it simply: there is no single test to diagnose ADHD.

Some assessments include thinking tasks too. NIMH says these look at things like memory, planning and decision-making, to identify strengths and challenges.

The whole picture

An assessment looks at the whole person, not only at ADHD. NICE guidance includes your needs, any other conditions, your circumstances at home, work or study, and your physical health.

NIMH says you may be asked about your mood and current and past medical conditions, to rule out other explanations. MedlinePlus adds that one step can be a physical exam, to rule out other problems with similar symptoms.

It can feel like a lot of questions, some of them personal. You can ask why something is being asked, and you can say if you need a moment. If something is hard to say out loud, writing it down beforehand and handing it over is fine too.

Some people bring a friend or relative along. NIMH says a companion can be there for support, help take notes and remember what was discussed.

Afterwards

If you’re diagnosed, the NHS says the specialist will talk to you about what this means and what will happen next, including what help and support may be available.

If you’re not, it’s still worth asking what support there is. NICE guidance says people whose symptoms fall short of an ADHD diagnosis may benefit from similar information, such as where to find support groups.

Either way, it’s okay to ask questions before you leave, and to ask for anything you didn’t follow to be explained again. Writing your questions down beforehand means you won’t have to remember them in the moment.

General information, not medical advice. Talk to your prescriber or doctor about your own treatment. How we write

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