The Kaiser Family Foundation (KFF) has released an update to its annual Medicaid Benefits Database, which for the first time includes details on behavioral health services. Specifically, the Medicaid Behavioral Health Services Database includes data about the various mental health and substance use disorder benefits covered under Medicaid in states, notable limits on those benefits, and cost sharing requirements as of July 1, 2018. The research is a helpful guide for Medicaid officials, researchers, and advocates trying to understand the variation across states in Medicaid benefits.