Pharmacy Benefit Manager Market Concentration for Prescriptions Filled at Retail Pharmacies by State and Payer Type

This cross-sectional study examines whether and how pharmacy benefit manager concentration varies across states and payer types.

Corresponding Author: Dima M. Qato, PharmD, PhD, MPH, Program on Medicines and Public Health, Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, 1985 Zonal Ave, Los Angeles, CA 90089 (qato@usc.edu).

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