Wen H, et al. - Medicaid is the leading payer of US behavioral health services and has been expected to further contribute to financing behavioral health services following states’ implementation of Medicaid expansions. There is a paucity of information about recent trends in psychiatrists’ acceptance of Medicaid, including before and after 2014, when most Medicaid expansions under the Affordable Care Act were actively initiated. Without adequate participation in Medicaid among psychiatrists, Medicaid enrollees with behavioral health needs may be unable to identify local psychiatrists who accepts new patients with Medicaid or have to wait a long time for an intake appointment.