See links in Resources & References section below.
Under the U.S. federal law known as the Individuals with Disabilities Education Act (IDEA), children with disabilities—including those with autism spectrum disorders—are eligible for a range of free or low-cost services. Under this provision, children in need and their families may receive medical evaluations, psychological services, speech therapy, physical therapy, parent counseling and training, assisted technology devices, and other specialized services.
Children under the age of 10 do not need an autism diagnosis to receive free services under IDEA. If they are experiencing a developmental delay (including delays in communication or social development), they are automatically eligible for early intervention and special education services.