Autism diagnosis rates have risen dramatically over recent decades, from about 1 in 2,500 children in the 1990s to 1 in 36 today. This increase is primarily due to changes in how we identify and define autism, not an actual epidemic.

Reasons for the Increase

• Expanded diagnostic criteria: The DSM-5 merged several separate diagnoses into one autism spectrum, capturing more individuals
• Better awareness: Parents, teachers, and doctors are more knowledgeable about autism signs
• Improved screening: Universal screening at 18 and 24 months catches cases that would have been missed
• Inclusion of milder presentations: Individuals who would not have been diagnosed under older criteria now receive appropriate recognition
• Better identification in girls and minorities: Historically underdiagnosed groups are increasingly being recognized

Is There Also a Real Increase?

Some researchers believe there may be a modest real increase alongside the diagnostic changes, potentially related to factors like advanced parental age, prenatal exposures, or other environmental influences. However, the majority of the increase is attributed to diagnostic and awareness changes.

What This Means

The rising numbers mean more families need access to services. ABA therapy remains the most effective intervention. Contact Treetop ABA Therapy to access services across 11 states.