Restraint, restrictive interventions, and seclusion are hotly contested practices with inconclusive evidence of their effectiveness. Because the use of restraint and seclusion on people with intellectual and developmental disabilities (IDD) is controversial and its effectiveness doubtable, this study was conducted to explore if and how they were permitted in Medicaid HCBS 1915(c) waivers, the largest providers of long-term services and supports (LTSS) for people with IDD. To do so, 111 fiscal year 2015 IDD waivers from across the nation were examined to determine if and how states permitted restraint, restrictive interventions, and seclusion. Findings revealed an overwhelming majority of waivers permitted the use of restraint (78.4%) and restrictive interventions (75.7%). A smaller proportion (24.3%) allowed the use of seclusion.