The goal of the proposed fellowship is to prepare the applicant, Kira Riehm, for an independent research career focused on improving the identification, management, and treatment of mood disorders among adolescents. To this end, the proposed fellowship consists of two complementary components: (1) a research project that aims to assess the relationship between depression screening and a range of diagnostic, treatment- related, health services use, and health outcomes among adolescents; and (2) a training plan composed of mentored research, didactic and informal training, experiential learning and professional development activities. The applicant will be supported by a rich array of resources at the Johns Hopkins Bloomberg School of Public Health and a strong mentorship team with expertise in health services research, depression and suicide prevention, adolescent health, and advanced causal inference methods. The training plan will allow Ms. Riehm to prepare for a research career by a) learning and applying rigorous epidemiological and statistical methods; b) developing expertise in the assessment, management, and treatment of mood disorders among adolescents; and c) strengthening the skills necessary for an independent academic research position. The proposed research project is of high