New research led by the University of Otago’s Associate Professor Ben Beaglehole has found that autism diagnosis rates in New Zealand have more than tripled over the past 15 years, reflecting significant changes in awareness, assessment and access to diagnostic services.
The study found diagnosis rates have increased across all age groups, ethnicities and genders, indicating that autism is being identified more frequently throughout the population rather than within any single group.
Researchers say the rise does not necessarily mean autism is becoming more common. Instead, the findings point to improved recognition of autism, greater public awareness, broader diagnostic criteria and increased understanding among health professionals, educators and whānau.
The research highlights how autism is increasingly being recognised not only in young children, but also in adolescents and adults who may previously have gone undiagnosed.
Associate Professor Beaglehole says earlier identification can play an important role in helping autistic people and their families access appropriate support, education and healthcare.
The findings also reinforce the growing demand for diagnostic and support services across New Zealand, with clinicians and advocacy groups continuing to call for improved access to assessments and timely interventions.
For Māori communities, the research adds to a growing body of evidence showing the need for culturally responsive autism services.
Previous University of Otago research has identified disparities in autism identification among Māori, suggesting systemic barriers may contribute to lower diagnosis rates and later access to support compared with non-Māori.
Researchers say improving equitable access to diagnosis is essential to ensuring autistic Māori and their whānau receive appropriate health, education and disability services.
The latest findings also reflect broader international trends, where autism diagnoses have increased as understanding of neurodiversity has evolved and awareness campaigns have reduced stigma surrounding assessment.
Advocates say earlier diagnosis can improve educational outcomes, strengthen access to specialist services and enable families to better understand and support autistic children and adults throughout their lives.
As diagnosis rates continue to rise, researchers say the focus must now shift toward ensuring New Zealand’s health, education and disability systems have the capacity to provide timely, culturally appropriate support for everyone who needs it.
The study adds to an expanding body of New Zealand research aimed at improving understanding of autism and ensuring support systems keep pace with growing demand across Aotearoa.
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