Wen H, et al. - Researchers here focused on recent trends in psychiatrists’ acceptance of Medicaid, including before and after 2014, when most Medicaid expansions under the Affordable Care Act went into effect. Psychiatrists' inadequate participation in Medicaid might not enable Medicaid enrollees with behavioral health needs to find a local psychiatrist who accepts new patients with Medicaid or have to wait a long time for an intake appointment. In the United States, Medicaid is the principal payer of behavioral health services and has been assumed to play an escalating role in financing behavioral health services following states’ implementation of Medicaid expansions.