Landmark UK Review Warns ADHD and Autism Diagnoses Are Nearing a 'Tipping Point'
A landmark government-commissioned review published on October 9 has warned that ADHD and autism diagnoses in England are approaching a "tipping point," with the risk of misdiagnosis and overdiagnosis rising. The 607-page report was led by Professor Peter Fonagy, a psychologist at University College London, with Professor Sir Simon Wessely of King's College London as vice-chair, and was commissioned by former health secretary Wes Streeting.
The review found that the proportion of young people with an autism diagnosis has increased roughly 40-fold since 2000, while ADHD diagnoses have risen about 15-fold. Among boys aged six to 11, recorded autism prevalence climbed from 0.4% in 2000 to 6.3% in 2025. Demand has overwhelmed services: more than 560,000 people had an open referral for an ADHD assessment at the end of 2025 — over 17 times the number recorded in 2019 — while a further 254,000 people were waiting for autism assessments in December. Yet population estimates of the "true prevalence" of ADHD and autism have remained broadly stable for decades, highlighting a widening gap between estimated prevalence and the demand for diagnosis.
The review took aim at the rapidly expanding private assessment industry. Independent providers now carry out more than half of NHS-funded ADHD assessments and around a third of autism assessments, while private provision costs have risen by around 252% in three years. The report says the NHS is overspending on diagnoses by £164 million a year, with some clinics charging the NHS up to £3,000 per patient for assessments — "a large and fast-growing use of public money running without consistent oversight, transparency or quality assurance." In response, ministers have promised new standards and regulations for all ADHD and autism clinics. The NHS will consult on price caps for assessments — proposed at about £850 for face-to-face adult assessments, £700 for virtual ones and £950 for children's — with the new tariff expected to take effect in April.
The review also rejected the idea that young people are simply less resilient than previous generations. Professor Fonagy stressed that the distress caused by anxiety and depression is real, driven by cultural and social factors including Covid disruption, financial and housing insecurity, competitive pressures from school and social media, loneliness, and declining support services. Around one in four people aged 16 to 24 now meet the criteria for a common mental health disorder, compared with roughly one in six in 1993. The report acknowledged, however, that a diagnostic label can follow a child for life: children diagnosed with ADHD were four times more likely to end up not in education, employment or training, and an early label can "close doors" and affect confidence.
The review recommends reducing reliance on a formal diagnosis as the gateway to help — giving people access to practical support without requiring a label, which would relieve pressure on assessment services. The authors said the data was too uncertain to establish that overdiagnosis was already happening at scale, but that "the trends are going that way." Wessely warned that if current trends continued, the risk of overdiagnosis and over-medicalisation could become "very, very likely." Ministers have promised a radical overhaul of the system.