Autism is a complex disorder with no specific diagnostic test so the disease is defined by its characteristics including cognitive defects, social, communication and behavioral problems, repetitive behaviors, unusual sensitivity to stimuli such as noise, restricted interests, and self stimulation. Exploration into the role of the immune system, genetic susceptibility, and environmental factors such as infections, vaccines, and diet has led to the emergence of numerous theoretical models to explain the biological basis for autism. Individuals with Autism Spectrum Disorders (ASD) often suffer from gastrointestinal problems which may contribute to ASD behavioral symptoms. Developmental disabilities (DDs) are chronic physical, cognitive, speech or language, psychological, or self-care conditions that typically originate during childhood, are likely to continue indefinitely; and require additional coordinated services, support, or other assistance for an extended duration or during a lifetime. Developmental disabilities profoundly affect children’s health and functioning. Additional study of unmet needs and access to care is needed.