Background: Transitioning to adult healthcare systems can be challenging, especially if left unaddressed for adolescents with special healthcare needs (ASHCN), such as those with autism spectrum disorder and attention-deficit/ hyperactivity disorder. While there is evidence of disparities between different demographics regarding general healthcare services, research on healthcare-specific transition planning is lacking. Thus, there is a critical need to continually investigate these disparities. Method: Using nationally representative data from the 2016 National Survey for Children's Health, several analyses were conducted to examine doctor-patient interactions and discussions about transitioning to adult health care. Accounting for demographic and diagnostic indicators allowed for the assessment of disparities. Results: Findings revealed significant disparities between age, disability and race relative to various healthcare transition support services. Conclusions: Findings provide valuable information that can inform the development of training programmes for healthcare providers, influence policy, modify procedures and interventions and highlight the need for increased advocacy for ASHCN.