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The effect of Medicare Part D on prescription drug composition and demand

Author

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  • David Zimmer

Abstract

Purpose - – The US Medicare Modernization Act of 2003 introduced optional prescription drug coverage, beginning in 2006, widely known as Medicare Part D. This paper uses up-to-date nationally representative survey data to investigate the impact of Part D not only on drug spending and consumption, but also on the composition of drug consumption. The paper aims to discuss these issues. Design/methodology/approach - – Specifically, the paper investigates whether Part D impacted the number of therapeutic classes for which drugs were prescribed, and also whether Part D lead to increased usage of drugs for specific medical conditions that typically receive drug-intensive therapies. Findings - – In addition to confirming findings from previous studies, this paper shows that Part D increased the number of therapeutic classes to which seniors receive drugs by approximately four classes. Part D also lead to increased usage of drugs used to treat upper respiratory disease, hypertension, and diabetes. Originality/value - – While mostly concurring with previous studies on the spending impacts of Part D, this paper is the first to shed light on other impacts of Part D, specifically with respect to its impact on therapeutic classes for which drugs are prescribed.

Suggested Citation

  • David Zimmer, 2015. "The effect of Medicare Part D on prescription drug composition and demand," Journal of Economic Studies, Emerald Group Publishing Limited, vol. 42(2), pages 170-185, May.
    • Handle: RePEc:eme:jespps:v:42:y:2015:i:2:p:170-185
    DOI: 10.1108/JES-08-2013-0109
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    Citations

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    Cited by:

    1. Ghosh, Ausmita & Simon, Kosali & Sommers, Benjamin D., 2019. "The Effect of Health Insurance on Prescription Drug Use Among Low-Income Adults:Evidence from Recent Medicaid Expansions," Journal of Health Economics, Elsevier, vol. 63(C), pages 64-80.
    2. Pak, Tae-Young & Kim, GwanSeon, 2017. "The impact of Medicare Part D on cognitive functioning at older ages," Social Science & Medicine, Elsevier, vol. 193(C), pages 118-126.

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