Copayment reductions generate greater medication adherence in targeted patients

Matthew L. Maciejewski, Joel F. Farley, John Parker, Daryl Wansink

Research output: Contribution to journalArticlepeer-review

92 Scopus citations


A large value-based insurance design program offered by Blue Cross Blue Shield of North Carolina eliminated generic medication copayments and reduced copayments for brand-name medications. Our study showed that the program improved adherence to medications for diabetes, hypertension, hyperlipidemia, and congestive heart failure. We found that adherence improved for enrollees, ranging from a gain of 3.8 percentage points for patients with diabetes to 1.5 percentage points for those taking calcium-channel blockers, when compared to others whose employers did not offer a similar program. An examination of longer-term adherence and trends in health care spending is still needed to provide a compelling evidence base for value-based insurance design.

Original languageEnglish (US)
Pages (from-to)2002-2008
Number of pages7
JournalHealth Affairs
Issue number11
StatePublished - Nov 1 2010

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