ADHD

A sharp rise in adult Attention Deficit Hyperactivity Disorder (ADHD) diagnoses is unfolding across Australia, revealing a complex landscape of medical access and diagnostic consistency. Although national data shows 2.36 per cent of adults aged 20 to 65 filled a prescription for ADHD medication in the 2025 financial year, this figure masks dramatic regional disparities.

The Geography of Diagnosis

Data analyzed by the University of New South Wales (UNSW) reveals that ADHD prescribing rates vary wildly across the country. In some regions, rates are far above the expected prevalence of 2.5 to 3 per cent, while other areas are barely diagnosing the condition at all.

Western Australia has emerged as a significant outlier, containing 13 of the 20 highest ADHD prescription neighborhoods in the country. Fremantle is identified as the most prominent hotspot in both the state and the nation.

Conversely, “ADHD deserts” have appeared in disadvantaged areas where diagnosis rates are critically low. In Fairfield, south-west Sydney, the prescription rate is just 0.3 per cent, suggesting that up to 90 per cent of adults with ADHD in that area may be left untreated.

Socio-Economic Factors and Anomalies

There is a general correlation between socio-economic advantage and higher diagnosis rates, likely due to the high cost of private psychiatric care. But, significant exceptions exist in areas like Bassendean and Bunbury in WA, and parts of Victoria and NSW.

High rates have been recorded in Melbourne’s Brunswick, Coburg, and Darebin South, as well as Sydney’s inner west areas of Marrickville, Sydenham, and Petersham. These findings suggest that income and education are not the only drivers of the diagnostic boom.

Experts suggest that increased awareness, potentially fueled by social media, may be leading more people to seek diagnoses. In Western Australia, a historical trend of higher treatment rates may also be contributing to the state’s current lead.

The Role of Telehealth and Diagnostic Quality

The growth of ADHD diagnoses coincides with the rise of telehealth clinics that advertise specific assessments. This has improved access in states like Western Australia, which has the lowest number of psychiatrists per capita.

However, some mental health professionals have questioned the depth of these assessments. Concerns have been raised that some clinics rely on pre-consultation questionnaires, leading to “rubber stamp” diagnoses without considering differential diagnoses.

Professor Nick Glozier has noted a phenomenon described as “cosmetic psychopharmacology,” where individuals may seek out clinicians who will validate a self-chosen diagnosis.

Risks of Misdiagnosis and Treatment

Incorrectly diagnosing ADHD can be harmful, as it may leave other significant mental health issues—such as mood or personality disorders—untreated. Because ADHD symptoms like memory and focus problems overlap with many psychiatric conditions, diagnosis often relies on a clinician’s subjective view.

There are also risks associated with the medications themselves, which are primarily psychostimulants and amphetamines. Side effects can include high blood pressure, elevated heart rate, anxiety, insomnia, and weight loss.

Emergency doctors in three states have reported an anecdotal increase in patients presenting with psychosis potentially linked to these medications. While rare, such episodes are described by the AMA as dangerous and scary for the patient.

Future Outlook and Public Health

The federal and state governments are attempting to bridge the gap by training GPs to diagnose ADHD and prescribe medication. This move aims to address the lack of publicly funded ADHD services.

However, this shift may not fully resolve the disparity. Current Medicare reimbursement structures might not adequately cover these assessments under bulk billing, which could necessitate co-payments that remain unaffordable for some.

Without increased scrutiny, some regions may continue to see diagnosis rates that experts consider out of control, while others remain underserved. The balance between expanding access and maintaining the integrity of the established guidelines remains a critical challenge.

Frequently Asked Questions

What is the expected prevalence rate of ADHD in adults?

Experts state that the actual prevalence rate of ADHD in adults is typically between 2.5 and 3 per cent.

What are “ADHD deserts”?

These are parts of Australia where diagnosis and treatment rates are significantly below expected levels, potentially leaving up to 90 per cent of adults with ADHD undiagnosed.

What are the potential dangers of an incorrect ADHD diagnosis?

A misdiagnosis can result in other mental health conditions going untreated. The prescribed stimulant medications can cause side effects such as high blood pressure, insomnia, and in rare cases, psychosis.

Do you believe the rise of telehealth has helped or hindered the accuracy of mental health diagnoses?