A significant and growing number of children across the United States are being diagnosed with autism and other developmental disabilities, according to comprehensive new research released by the Centers for Disease Control and Prevention. The findings indicate a broad upward trend that spans multiple diagnostic categories, pointing to shifting dynamics in how developmental conditions are identified, diagnosed, and reported among American families over the past several years.
Between 2019 and 2024, the proportion of parents reporting that their child had been diagnosed with a developmental disability rose notably, moving from 16.7 percent up to 20.5 percent. This upward trajectory means that by the time the 2023-2024 survey period was concluded, an estimated one in every five children between the ages of 3 and 17 in the United States had received a diagnosis within one of the tracked developmental categories.
The findings were published recently in the prominent medical journal Pediatrics. They are derived from an extensive analysis of data collected through the National Health Interview Survey, an annual government-administered questionnaire that gathers detailed information from households nationwide regarding their healthcare experiences, health status, and access to medical services.
To determine these prevalence rates, researchers utilized responses from parents who were asked a specific set of screening questions. Participants were asked whether they had ever been informed by a healthcare professional that their child had developmental disabilities, a category that explicitly included autism, attention-deficit/hyperactivity disorder, intellectual disability, or any other general developmental delay. Additionally, parents were asked if a school representative or a health professional had ever told them that their child possessed a learning disability. For the parameters of the study, a child was categorized as having “any developmental disability” if their parent or guardian indicated an affirmative response to any of these five distinct conditions.
When examining the data across children ages 3 to 17, the study revealed that the prevalence increased across nearly all specific diagnoses. Furthermore, researchers noted substantial increases for every single category included in the questionnaire, with the sole exception of intellectual disability. The data paints a picture of widespread diagnostic growth, though the rate of increase varied considerably depending on the specific condition, the child’s age, and various demographic factors.
Autism alone experienced a dramatic surge, jumping by more than 42 percent over the study period. This category saw particularly sizable growth among specific demographics that have historically experienced different diagnostic timelines, including children ages 3 to 5, girls, children living outside of major metropolitan areas, and kids belonging to low-income families. The acceleration of autism diagnoses among very young children and demographic groups traditionally diagnosed later in childhood represents a notable shift in the epidemiological landscape.
Other conditions tracked in the survey similarly demonstrated upward movements. The number of parents reporting that their child had been diagnosed with attention-deficit/hyperactivity disorder, commonly known as ADHD, climbed by 26 percent. Meanwhile, learning disabilities and other developmental delays each registered growth of about 16 percent. In contrast, intellectual disability showed a much more modest change, ticking up by more than 6 percent over the course of the study years.
Overall, the researchers concluded that the percentage of children diagnosed with developmental disabilities increased significantly during the analyzed timeframe. This cumulative rise culminated in the milestone figure where approximately 20 percent of children in the surveyed age bracket were reported by their parents to have at least one of these conditions.
Benjamin Zablotsky, a statistician at the CDC’s National Center for Health Statistics who served as the lead author of the study, pointed out that the distinct uptick observed among certain groups of children—most notably very young children—had not been as pronounced in previous surveillance reports. This emergence suggests that the landscape of early childhood identification is actively shifting.
“We believe these new increases could be related to earlier detection and awareness,” Zablotsky explained, highlighting how medical and educational systems are interacting with young families.
The interpretation of these rising numbers has drawn commentary from public health and sociological experts who were not directly involved in the research. Scott Landes, a sociology professor at Syracuse University, emphasized that the documented rise in prevalence should be viewed through a constructive lens as a positive development for child healthcare and public support systems.
“Research suggests that better screening, greater awareness and reduced stigma explain at least part of the increase, which means that more children are being identified and connected to services they previously would have missed,” Landes said. He added that the data reflects a broader societal shift in how these conditions are recognized and addressed.
“A higher reported prevalence rate by parents is best understood, at least in part, as progress in finding and serving disabled children who were always there but were not receiving needed services,” Landes concluded.
Families and educators looking to stay informed on these evolving trends can find ongoing coverage through specialized reporting platforms, including Disability Scoop’s free email newsletter, which delivers developmental disability news directly to subscribers.
