What a careful ADHD assessment looks like for a teenager

If you’ve made it to this page, the question’s been sitting with you for a while. Maybe a teacher mentioned it. Maybe your teen brought it up themselves, after a friend was diagnosed, after seeing it described online and recognising something. Maybe grades that came easily in primary school aren’t anymore, and the usual explanations don’t quite fit. What you’re looking for now is a clinician who’ll work it through properly, with your teen, with you, with the school, and tell you what they actually find.

That’s what this assessment is for.

A note for any teenager reading this themselves: this assessment is set up around you. Your parents are part of the data, but you’re not the subject of the work, you’re the person it’s for. You’ll have your own interview. You’ll have your own feedback session. The report will be written so that you can read it.

Why ADHD in adolescence is harder to assess than most clinics will tell you

Adolescent ADHD is a dense clinical question. The same patterns, falling grades, lost focus, restlessness, irritability, sleep that’s gone sideways, motivation that won’t come back, can be produced by depression, anxiety, autism with high masking, executive-function problems from chronic sleep deprivation, the cognitive cost of social pressure, vaping or substance use, or the ordinary disorganisation of a teenage brain whose frontal lobe is still wiring up. Often more than one of these is present at once.

Adolescent ADHD also has its own diagnostic pattern. Many late-discovery cases, particularly in girls and in academically capable teens, were missed in primary school because the inattention was quiet, the masking was good, and the demands were within reach. Secondary school changes that. The work-load increases, the structure decreases, and the strategies that worked before stop working. By the time the family is on this page, what looks like a sudden change is often a long-standing presentation that’s run out of compensatory room.

The structure of the assessment is built to handle that complexity. The work I do here is shaped by training in three children’s mental health programmes, pediatric mood and developmental training under Dr. Eric Youngstrom at UNC, autism developmental seminars in Dr. Geraldine Dawson’s group at Duke, and parent-mediated behavioural treatment work in Dr. Stephen Whiteside’s group at Mayo Clinic. Multi-informant data, broad differential, cognitive and achievement profiling, real attention to identity and self-concept, and a formulation written for an adolescent reader.

What’s involved

The teen ADHD assessment includes:

The conversations	A clinical interview with your teen: privacy-protected, age-appropriate, and the centre of the assessment. And a parent interview covering developmental history, current functioning, family context, and the questions you’ve come in with.
What others see	Multi-informant ADHD-specific rating scales (Conners-3 across self-report, parent, and teacher; Vanderbilt teacher form), and a broad behavioural and emotional screen (BASC-3) looking across attention, anxiety, mood, conduct, and self-perception.
The testing	Cognitive assessment (WISC-V or WAIS-V depending on age) for reasoning, working memory, and processing speed, and achievement testing (WIAT-IV), included as standard, for specific learning differences, twice-exceptional profiles, and educational-accommodations documentation.
Looking deeper when needed	Psychiatric differential screening (MINI-KID), targeted screens for mood, anxiety, autism, and sleep, and an optional classroom observation when the clinical question warrants it.
What you and your teen take home	An integrated written formulation and report, a feedback session with you, and a separate developmentally appropriate feedback conversation with your teen. They own the picture of themselves that the assessment produces.

Sometimes a child is gifted and has ADHD at the same time, and the two hide each other. If that might be your child, here’s more on twice-exceptional (2e) assessment.

A note on identity

Adolescence is the age at which a person starts forming a story about who they are. An ADHD assessment in adolescence is partly a clinical question and partly a question about that story. Done badly, an assessment can hand a teenager a label they didn’t ask for and don’t know what to do with. Done well, it can hand them a more accurate language for things they’ve been blaming on character, on laziness, on “being broken,” for a long time.

That’s why the teen feedback session matters. The diagnosis (or no diagnosis) isn’t the end of the work. The conversation about what it means for them is.

Why this isn’t a quick checklist

The two diagnostic traps in adolescent ADHD work are mirror images of each other.

Over-diagnosis	The clinician sees a teen with poor focus, low motivation, and falling grades, sees ADHD-fit on a rating scale, and stops looking. The depression underneath isn’t named. The sleep history isn’t taken. The autism overlap isn’t considered. The teen takes a stimulant for a year and the underlying picture doesn’t move.
Under-diagnosis	The clinician decides good grades through primary school mean ADHD must not be the issue, missing the high-masking late-discovery presentations more common in girls and in academically capable teens, and the cases where ADHD has been compensated for by intelligence and environmental scaffolding until secondary-school demands exceeded capacity.

A careful assessment has to navigate both. That’s why the broad screen, the multi-informant data, and the cognitive and achievement profile carry as much weight as the ADHD-specific instruments. It’s also why this takes more than one appointment.

What happens after the assessment

The assessment is the start, not the end. Depending on what the formulation shows, the recommendations might include:

• Direct therapy, CBT for co-occurring anxiety or low mood, exposure work for OCD-spectrum patterns, executive-function coaching, or skills-based work that fits the teen’s actual goals
• Parent-side support, most older teens need to drive their own care, but parents of younger adolescents may benefit from Parent-Child Emotion-focused Therapy (PCET) or coaching on how to scaffold without taking over. The parent behavioural training page is the longer version of that conversation.
• A school accommodations conversation, what to ask for, what’s reasonable, who to send the letter to
• Medication consultation, if medication is on the table, I’ll connect you with a paediatrician or adolescent psychiatrist whose practice I trust. I don’t prescribe; the assessment will give them a clean clinical picture to work from.

The feedback session leaves you, and your teen, with a clear sense of the next step.

Fees and what’s included

The assessment	From SGD 4,500, covering the full diagnostic battery. Parent and teen interviews, multi-informant rating scales, a broad behavioural and emotional screen, cognitive assessment, achievement testing, targeted differential screens, a written clinical formulation and report, and feedback sessions for parents and for the teen.
When the fee can rise	Where the clinical complexity warrants it: an additional differential needing full work-up, a school observation, or additional collateral. I’ll tell you upfront, before any work begins, if I’m recommending that.
Payment	The full assessment fee is due before the first appointment.

When this is the right starting point, and when it isn’t

This is a thorough private assessment, and it isn’t the right starting point for every adolescent. If what your teen needs first is help with active risk, suicidality, an eating disorder, acute psychiatric concern, that needs to be addressed before assessment work can be useful, and I’ll help you find the right next step if you’ve landed here by mistake. If your teen genuinely doesn’t want to be assessed, the assessment isn’t likely to land well; sometimes the right first move is a few sessions of therapy that lets them decide for themselves whether to take the next step.

If your child is 12 or younger, the child ADHD assessment page is here. And if you kept recognising yourself while reading about your teen, you are not imagining it: ADHD runs strongly in families, and it is common for a parent to book their own assessment after their child’s. I assess adults as well, so if that time comes, you will not have to start the story from scratch with someone new.

If you’re not sure whether this is the right starting point, the free 15-minute Meet & Greet is exactly what it’s for.

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