Little research has explored factors effecting the time it takes caregivers to initiate the diagnostic process (e.g., first phone call to a provider) after their infant or toddler received a positive screen for Autism Spectrum Disorder (ASD). The current study investigated the time it takes caregivers of an at-risk sample of toddlers who are enrolled in a statewide early intervention program and screen positive for ASD to initiate the evaluation process. A hierarchical multiple regression was used to identify factors that may affect this timeline. ASD symptom severity and child age were found to predict the length of time between receiving the positive screen and the initiation of the evaluation process; no additional factors (i.e., gender, only child status, younger sibling status, race/ethnicity) were significant. Results indicate that severity of symptoms and child age may be the driving factors for caregivers to initiate the formal evaluation process.