Marcela Horvitz-Lennon

Natural Scientist; Professor, Pardee RAND Graduate School
Boston Office


M.D. in medicine with intern, Pontifical Catholic University; M.P.H., Johns Hopkins University


Marcela Horvitz-Lennon is a physician scientist at the RAND Corporation. She is also a member of the medical staff at the Cambridge Health Alliance. Previously, she was affiliated with the Department of Psychiatry at University of Pittsburgh Medical School and with the Chilean Ministry of Health. She is a practicing psychiatrist and mental health services researcher. Her research focuses on the quality and value of the mental and physical health care received by adults with schizophrenia and other serious mental illnesses, a vulnerable patient population whose high disease burden is compounded by high rates of chronic medical comorbidity and social disadvantage. Much of her research work has been public sector-related because of the significance of Medicaid and other public insurance for this population. Horvitz-Lennon has conducted research on racial/ethnic and geographic disparities in care; federal and Medicaid policy; use patterns and safety of antipsychotic drugs; underuse and overuse of mental health interventions; integrated physical and mental health care of people with serious mental illness; and diffusion of mental health innovations. She has served and continues to serve as principal investigator or co-investigator of NIMH and other federally-funded research. Horvitz-Lennon earned her M.D. in Santiago, Chile, and completed her psychiatric residency training at the University of Maryland Medical School and a fellowship in community psychiatry at Johns Hopkins Medical School. She earned a Masters degree in public health at Johns Hopkins University School of Public Health.

Recent Projects

  • An In-Depth Investigation of Racial & Ethnic Disparities in Schizophrenia Care
  • Medicare Part D Cost-Sharing & Treatment of Mental Disorders among Disabled Dually Eligible Beneficiaries
  • Evaluation of the SAMHSA Primary and Behavioral Health Care Integration Grant Program
  • Identifying and Addressing Health Care Disparities among Severely Mentally Ill Latinos