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Autism can be reliably diagnosed by a specialist by age 2, but the average age of autism diagnosis in the U.S

July 9, 2024

Autism can be reliably diagnosed by a specialist by age 2, but the average age of autism diagnosis in the U.S. is 5 years.
The average age of first intervention in the U.S. is 4.7 years.
The average age of diagnosis for children in lower income households is 4.7 years compared to 5.2 years in higher income households.

Source: National Survey of Children’s Health (NSCH) (2016-2019)

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