Venue: The Fuqua School of Business, Duke University, 1 Towerview Drive, Durham, NC 27708-0120

 

Presentation

The impact of the Medicare Part D prescription benefits on generic drug use

Authors:

Presenter: James X. Zhang (Virginia Commonwealth University)

Discussant: Judith A. Shinogle (University of Maryland)

Session: The Impact of Medicare Part D on Prescription Drug Expenditures and Utilization

Room: Classroom A

When: Monday 8:30 a.m. - 10 a.m.

Using pharmacy claim data that represented approximately 2.4 million unique subjects, the study finds that beneficiaries were slightly less likely to fill prescriptions for generic drugs vs. brand-name drugs in 2006 compared to 2005 (OR 0.95, 95% CI 0.94-0.95) as a result of Part D. The magnitude and direction of impact varies across 15 therapeutic classes. This analysis adjusted for individual-level characteristics including comorbidities and insurance plan generosity, socio-demographic characteristics measured through zip code-linked Census data, baseline differences between Part D and non-Part D enrollees, and time trend.