Impact of provider mailings on medication adherence by Medicare Part D members

Bijan J Borah, Yang Qiu, Nilay D Shah, Patrick P. Gleason

Research output: Contribution to journalArticle

3 Scopus citations


Background: The Medicare 5-Star Rating System measures and provides incentive for improving Medicare Part D plans through a quality-based payment program. Adherence to medications for chronic conditions is key to the Star ratings. Our objective was to assess the impact of direct-to-provider letters on improving medication adherence. Methods: Members of a large US pharmacy benefits manager (PBM) who did not adhere to prescription of oral diabetes (antidiabetics), cholesterol-reducing (statins), or hypertension (renin angiotensin system [RAS] antagonists) drug therapy were identified from the prescriptions claims data of>600,000 continuously enrolled Medicare members. Nonadherence was defined by the Star ratings definition of proportion of days covered (PDC)

Original languageEnglish (US)
StateAccepted/In press - Nov 5 2014


  • Medicare Part D prescription plan
  • Medicare Star Rating System
  • Medication adherence
  • Prescriber mailing
  • Proportion of days covered

ASJC Scopus subject areas

  • Health Policy

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