Many states cover mental health home and community-based services (HCBS) for youth through 1915(c) Medicaid HCBS waivers that allow states to waive certain Medicaid eligibility criteria and define high-risk populations based on age, medical condition(s), and disability status. We sought to evaluate how States are covering children and adolescents with mental health needs through 1915(c) waivers compared to other youth waiver populations. Data elements were extracted from Medicaid 1915(c) approved waivers applications for all included waivers targeting any pediatric age range through October 31, 2018. Normalization criteria were developed and an aggregate overall coverage score and level of funding per person per waiver were calculated for each waiver. One hundred and forty-two waivers across 45 states were included in this analysis. Even though there was uniformity in the Medicaid applications, there was great heterogeneity in how waiver eligibility, transition plans, services covered, and wait lists were defined across group classifications. Those with mental health needs (termed serious emotional disturbance) represented 5% of waivers with the least annual funding per person per waiver. We recommend greater links between public policy, infrastructure, health care providers, and a family-centered approach to extend coverage and scope of services for children and adolescents with mental health needs.