ADHD and autism at risk of over-diagnosis, says government review

by | Oct 9, 2026 | Health

ADHD and autism at risk of over-diagnosis, says government review

A government-commissioned review has identified concerns about the potential over-diagnosis of ADHD and autism in England, particularly among children and young people. The review noted that diagnostic rates have risen substantially over the past 25 years, with current figures in some age groups appearing to exceed the numbers expected in the general population. Authorities expressed particular concern about private companies conducting assessments for the NHS, citing worries regarding quality and consistency of evaluations, and recommended implementing stricter oversight along with prohibitions on marketing practices.

The review, led by prominent medical experts and initiated months earlier, examined diagnoses across all age groups but concentrated on children and adolescents, who display the highest diagnosis rates. Experts highlighted a problematic pattern in which diagnostic labels often emphasize individuals’ difficulties rather than their capabilities and potential, potentially damaging their outcomes in educational, employment, and social contexts. Research presented in the report indicated that children diagnosed with autism and ADHD before age 17 are approximately four times more likely to be outside education, employment, or training between ages 16 and 24.

The review also documented significant harm caused by extended waiting periods for diagnosis. One family described a three-year delay in obtaining an autism assessment for their son, during which his needs became increasingly apparent, ultimately receiving diagnosis only months before school entry. Consequently, the review recommended prioritizing individuals with the most complex needs on waiting lists and exploring alternative forms of non-medical support, such as workplace and school adjustments and lifestyle interventions addressing sleep and anxiety.

Experts cautioned against treating all difficulties as medical conditions requiring diagnosis, noting risks of conflating typical brain function variation with diagnosable conditions. Data showed approximately 4% of children aged 6 to 17 currently receive autism diagnoses, substantially higher than the 1-2% prevalence suggested by research studies. However, the review acknowledged that some supporting data originated nearly a decade ago, limiting definitive conclusions about current over-diagnosis prevalence.

The government indicated it would announce a new support delivery framework in its upcoming mental health strategy expected before year-end and committed to implementing enhanced regulatory standards for ADHD and autism assessments. Mental health advocates emphasized the need for systemic reform to address the widespread distress young people experience around mental health and neurodevelopmental conditions.

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