title: PBMs: a key player in Medicare drug coverage.
authors.forename: B A
authors.initials: BA
authors.lastname: Toan
authors.forename: E
authors.initials: E
authors.lastname: Scripts
mesh_terms: D000368:Aged; D016527:Drug Costs / Q000706:statistics & numerical data / Q000639:trends; D004346:Drug Information Services; D011307:Drug Prescriptions / Q000191:economics*; D006801:Humans; D019458:Insurance Coverage / Q000458:organization & administration*; D008329:Managed Care Programs / Q000458:organization & administration*; D006278:Medicare / Q000458:organization & administration*; D010593:Pharmaceutical Services / Q000458:organization & administration*; D014481:United States