Our Services Diagnostic Service Appointment Offer & Assessment Preparation The client to be offered a person-centered appointment for the Autism Diagnostic Observation Schedule (ADOS-2). A letter will be sent detailing the date, time, and appointment process. A video call for the Autism Diagnostic Interview (ADI-R) will also be arranged with an informant (a contact who can provide a developmental history assessment on the person to be assessed). Approximately two months before the appointment unless a cancellation slot is offered: Client will receive a request for any additional information (which will be emailed before appointment). The Diagnostics team will request that the client contacts their GP so they can provide a medical summary. Full payment will be due, minus the payment for screens (credit card payment option is available). Click here to read about Assessment Process and Outcome Manage Cookie Preferences