Erin Trish

Associate Professor,
Department of Pharmaceutical and Health Economics, School of Pharmacy,
Co-Director, Leonard D. Schaeffer Center for Health Policy and Economics,
University of Southern California

Erin Trish is an expert on matters at the intersection of public policy and healthcare markets. She assesses the effect of healthcare regulation and policy on healthcare markets, participants, and outcomes.

Professor Trish has extensive knowledge of mainstream government health programs, such as Medicare and Medicaid. She is also an expert on specialized federal and state healthcare and data initiatives, including Meaningful Use certification and evolving price transparency mandates. Professor Trish applies this expertise to matters involving provider and payor disputes, risk adjustment, private and out-of-network reimbursement, electronic health records (EHR), and surprise billing.

As an expert witness, Professor Trish has testified at arbitration, and in antitrust litigation involving health insurance markets. She has also testified in the California State Assembly. She has presented her research at numerous federal agencies, including the Federal Trade Commission, the Center for Consumer Information and Insurance Oversight, the Congressional Budget Office, and the Office of the Assistant Secretary for Planning and Evaluation.

Professor Trish’s research has addressed such topics as insurance premiums, prescription drug spending, healthcare market concentration, health plan benefits, and healthcare reform. She has won several research awards, notably the Seema S. Sonnad Emerging Leader in Managed Care Research Award, which recognizes early achievements in the field and potential for exceptional long-term contributions.

Professor Trish has published in leading health policy, health economics, and medical journals. Her work has appeared in the New England Journal of MedicineHealth Affairs, the American Journal of Managed Care, and the Journal of Health Economics, among others.

At USC, Professor Trish teaches executive-level courses in health policy and management at the Marshall School of Business. She also serves as a nonresident fellow in economic studies at the Brookings Institution and as a scholar with the USC-Brookings Schaeffer Initiative for Health Policy.