Schedule an evaluation with a licensed psychologist, psychiatrist, developmental pediatrician, or neurologist experienced in autism
Provide a detailed developmental history, including early language, social, and behavior milestones
Share observations from parents, caregivers, teachers, or partners about current and past behaviors
Complete standardized autism screening questionnaires if recommended
Undergo a clinical diagnostic interview focused on social communication, restricted interests, and repetitive behaviors
Receive direct behavioral observation by the clinician
Use standardized diagnostic tools when appropriate, such as ADOS-2 or ADI-R
Rule out other conditions with similar features, such as ADHD, anxiety, language disorders, intellectual disability, or hearing problems
Review medical, educational, and mental health records
Assess functioning across settings, including home, school, work, and social situations
Confirm whether symptoms began in early development and cause significant impairment
Ask for a written diagnostic report with findings and recommendations
Seek a second opinion if the diagnosis is unclear or incomplete