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How ADHD Is Diagnosed in Australia

ADHD diagnosis in Australia runs from a GP referral through a structured clinical interview and standardised rating scales to a formal assessment by a psychologist, psychiatrist or paediatrician. Here is the process end to end, and who is qualified to carry it out.

ADHD diagnosis in Australia starts with a GP visit and ends with a formal clinical assessment, usually carried out by a psychologist, psychiatrist or paediatrician. There is no single test involved. Diagnosis rests on a structured clinical interview, standardised rating scales and information from people who know you, following the Australian Evidence-Based Clinical Practice Guideline for ADHD.

Step one: see your GP

A GP is the usual first point of contact for anyone who suspects they might have ADHD, according to healthdirect, the federally funded health information service. At this stage, the GP's role is to rule out other explanations for the symptoms and write the referral that gets you to a psychologist, psychiatrist or paediatrician, the three professions healthdirect names as qualified to diagnose ADHD in Australia. Which one you see first often comes down to what's available locally and whether medication is likely to be part of the plan, since only a psychiatrist or paediatrician can prescribe it.

The clinical interview

The core of an ADHD assessment is a clinical interview lasting two to three hours, sometimes split across more than one session, carried out by a clinician experienced in developmental and mental health disorders, per the Australian ADHD clinical practice guideline. Alongside the interview, the clinician works through standardised rating scales: narrow-band scales that focus specifically on ADHD symptoms, and broad-band scales that look at overall psychosocial functioning. Educational or occupational input from a teacher or employer often feeds into this picture too, because a diagnosis depends on symptoms showing up in more than one setting, not just how you present in the room.

Ruling out other conditions

A proper assessment also includes a medical check to exclude conditions that can look like ADHD, and to flag anything that commonly occurs alongside it. Neuropsychological testing was not required for the diagnosis of ADHD, per the same guideline, though a clinician might still recommend it if something about your presentation needs a closer look at a co-occurring condition. For adults, there's an extra step: establishing that symptoms were present in childhood, sometimes through old school reports, since a diagnosis needs a lifelong pattern rather than difficulties that started recently.

The guideline behind the process

This process comes from the Australian Evidence-Based Clinical Practice Guideline for ADHD, launched on 5 October 2022 and NHMRC-approved for five years, setting out 113 clinical recommendations and developed with over 800,000 Australians with ADHD in mind. Separate national reporting put the number of Australians living with ADHD at around 800,000 in 2019, climbing toward 1.5 million by 2023, close to 6 percent of the population. Whichever professional you end up seeing, the structure of the assessment, interview, rating scales, collateral information, medical check, stays largely the same.

Common questions

Sources

• AADPA: Australian ADHD clinical practice guideline, diagnosis
• AADPA: Australian ADHD clinical practice guideline, launch
• healthdirect Australia: Attention deficit disorder (ADD) or ADHD
• University of Wollongong: A 12-month wait and a $1,400 bill

Related reading

• What to expect at an ADHD assessment
• The three types of ADHD: inattentive, hyperactive-impulsive and combined
• ADHD assessment cost and wait time in Australia