ABSTRACT Introduction: Churning on and off and/or experiencing coverage gaps is common among public health insurance recipients. Although the Affordable Care Act (ACA) provisions to extend parental coverage for adolescents transitioning to young adulthood on private insurance plans were implemented in 2010, no such protection was mandated for adolescents with public health insurance. Methods: Oregon public health insurance enrollment and electronic health record data from community health centers were used to conduct a retrospective, observational cohort study of Oregon adolescents (17-19 years of age) with public coverage [January 1, 2011-December 31, 2013 (n=51,988)] to assess loss. Time-to-event methods determined the association of cove...