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Effects of Prescription Drug Insurance on Hospitalization and Mortality: Evidence from Medicare Part D

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  • Robert Kaestner
  • Cuping Schiman
  • G. Caleb Alexander
Abstract
We used Medicare administrative data (2002–2009) and an instrumental variables design that exploits the natural experiment created by the implementation of Medicare Part D to estimate the effect of prescription drug coverage insurance on the use and costs of inpatient services. We find that gaining prescription drug insurance through Part D caused approximately a 4 percent decrease in hospital admission rate, a 2–5 percent decrease in Medicare inpatient payments per person, and a 10–15 percent decrease in inpatient charges. Among specific types of admissions, gaining insurance was associated with significant decreases in admissions for CHF and COPD.

Suggested Citation

  • Robert Kaestner & Cuping Schiman & G. Caleb Alexander, 2019. "Effects of Prescription Drug Insurance on Hospitalization and Mortality: Evidence from Medicare Part D," Journal of Risk & Insurance, The American Risk and Insurance Association, vol. 86(3), pages 595-628, September.
    • Handle: RePEc:bla:jrinsu:v:86:y:2019:i:3:p:595-628
    DOI: 10.1111/jori.12229
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    References listed on IDEAS

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    1. Gary V. Engelhardt & Jonathan Gruber, 2011. "Medicare Part D and the Financial Protection of the Elderly," American Economic Journal: Economic Policy, American Economic Association, vol. 3(4), pages 77-102, November.
    2. Amitabh Chandra & Jonathan Gruber & Robin McKnight, 2010. "Patient Cost-Sharing and Hospitalization Offsets in the Elderly," American Economic Review, American Economic Association, vol. 100(1), pages 193-213, March.
    3. Jonathan D. Ketcham & Kosali Simon, 2008. "Medicare Part D's Effects on Elderly Drug Costs and Utilization," NBER Working Papers 14326, National Bureau of Economic Research, Inc.
    4. Congressional Budget Office, 2012. "Offsetting Effects of Prescription Drug Use on Medicare’s Spending for Medical Services," Reports 43741, Congressional Budget Office.
    5. Helen Levy & David R. Weir, 2010. "Take-up of Medicare Part D: Results From the Health and Retirement Study," The Journals of Gerontology: Series B, The Gerontological Society of America, vol. 65(4), pages 492-501.
    6. Gaynor Martin & Li Jian & Vogt William B, 2007. "Substitution, Spending Offsets, and Prescription Drug Benefit Design," Forum for Health Economics & Policy, De Gruyter, vol. 10(2), pages 1-33, July.
    7. Robert Kaestner & Nasreen Khan, 2012. "Medicare Part D and Its Effect on the Use of Prescription Drugs and Use of Other Health Care Services of the Elderly," Journal of Policy Analysis and Management, John Wiley & Sons, Ltd., vol. 31(2), pages 253-279, March.
    8. Congressional Budget Office, 2012. "Offsetting Effects of Prescription Drug Use on Medicare’s Spending for Medical Services," Reports 43741, Congressional Budget Office.
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    Cited by:

    1. Abe Dunn & Adam Hale Shapiro, 2019. "Does Medicare Part D Save Lives?," American Journal of Health Economics, MIT Press, vol. 5(1), pages 126-164, Winter.
    2. Tianyan Hu & Sandra L. Decker & Shin-Yi Chou, 2017. "The impact of health insurance expansion on physician treatment choice: Medicare Part D and physician prescribing," International Journal of Health Economics and Management, Springer, vol. 17(3), pages 333-358, September.
    3. Américo, Pedro & Rocha, Rudi, 2020. "Subsidizing access to prescription drugs and health outcomes: The case of diabetes," Journal of Health Economics, Elsevier, vol. 72(C).
    4. Sarah Miller & Norman Johnson & Laura R Wherry, 2021. "Medicaid and Mortality: New Evidence From Linked Survey and Administrative Data," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 136(3), pages 1783-1829.
    5. Tianyan Hu & Sandra L. Decker & Shin-Yi Chou, 2014. "The Impact of Health Insurance Expansion on Physician Treatment Choice: Medicare Part D and Physician Prescribing," NBER Working Papers 20708, National Bureau of Economic Research, Inc.
    6. Wang, Chao & Li, Qing & Sweetman, Arthur & Hurley, Jeremiah, 2015. "Mandatory universal drug plan, access to health care and health: Evidence from Canada," Journal of Health Economics, Elsevier, vol. 44(C), pages 80-96.
    7. Ausmita Ghosh & Kosali Simon & Benjamin D. Sommers, 2017. "The Effect of State Medicaid Expansions on Prescription Drug Use: Evidence from the Affordable Care Act," NBER Working Papers 23044, National Bureau of Economic Research, Inc.
    8. Huh, Jason & Reif, Julian, 2017. "Did Medicare Part D reduce mortality?," Journal of Health Economics, Elsevier, vol. 53(C), pages 17-37.
    9. Padmaja Ayyagari & Dan M. Shane & George L. Wehby, 2017. "The Impact of Medicare Part D on Emergency Department Visits," Health Economics, John Wiley & Sons, Ltd., vol. 26(4), pages 536-544, April.
    10. Clayton, Denise Hammock, 2019. "The Effect of Prescription Drug Coverage on Mortality: Evidence from Medicaid Implementation," Journal of Health Economics, Elsevier, vol. 63(C), pages 100-113.
    11. Jeffrey Diebold, 2018. "The Effects of Medicare Part D on Health Outcomes of Newly Covered Medicare Beneficiaries," The Journals of Gerontology: Series B, The Gerontological Society of America, vol. 73(5), pages 890-900.
    12. Abraham Abebe Asfaw, 2019. "The effect of prescription drug insurance on health behavior: Evidence from Medicare Part D," Health Economics, John Wiley & Sons, Ltd., vol. 28(3), pages 403-418, March.
    13. Padmaja Ayyagari & Daifeng He, 2017. "The Role of Medical Expenditure Risk in Portfolio Allocation Decisions," Health Economics, John Wiley & Sons, Ltd., vol. 26(11), pages 1447-1458, November.
    14. Sebastian Tello Trillo & Ausmita Ghosh & Kosali Simon & Johanna Catherine Maclean, 2015. "Losing Medicaid: What happens to hospitalizations?," NBER Working Papers 21580, National Bureau of Economic Research, Inc.
    15. Shen, Yichen & Noguchi, Haruko, 2021. "Impacts of anticancer drug parity laws on mortality rates," Social Science & Medicine, Elsevier, vol. 272(C).
    16. Padmaja Ayyagari, 2016. "Prescription drug coverage and chronic pain," International Journal of Health Economics and Management, Springer, vol. 16(2), pages 189-200, June.
    17. Chiara Orsini, 2019. "The mortality effects of changing public funding for home health care: An empirical analysis of Medicare home health care in the United States," Health Economics, John Wiley & Sons, Ltd., vol. 28(7), pages 921-936, July.
    18. Ayyagari, Padmaja & Shane, Dan M., 2015. "Does prescription drug coverage improve mental health? Evidence from Medicare Part D," Journal of Health Economics, Elsevier, vol. 41(C), pages 46-58.

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    More about this item

    JEL classification:

    • I12 - Health, Education, and Welfare - - Health - - - Health Behavior
    • I13 - Health, Education, and Welfare - - Health - - - Health Insurance, Public and Private
    • I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health

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