Louis Preston Garrison Jr. (born 1950) is an American health economist who has made significant contributions to pharmacoeconomics, pharmacogenomics and personalized medicine, regulatory benefit-risk analysis, insurance, pricing, reimbursement and risk-sharing agreements. He also made numerous contributions on the economic evaluation of pharmaceuticals, diagnostics, devices, surgical procedures, and vaccines, particularly as related to organ transplantation, influenza, measles, obesity, and cancer. Garrison has published over a hundred manuscripts in peer-reviewed journals and contributed to several book chapters.