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The impact of change from copayment to coinsurance on medical care usage and expenditure in outpatient setting in older Koreans

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  • Byoungjun Bae
  • Bo Ram Choi
  • Inmyung Song

Abstract

Patient cost‐sharing change was implemented on August 1, 2007, for outpatient care in the clinic setting in Korea from copayment to coinsurance. This study aims to estimate the effect of the policy change on medical care usage and expenditure in older Koreans. By using national health insurance claims data from the Health Insurance Reimbursement Assessment Service, this study analyzed the entire 137 million claims for a total of approximately 4.1 million patients aged 60 to 69 years who had been diagnosed and/or treated for outpatient care in clinics from January 1, 2007, to December 31, 2008. Medical care usage was defined as the proportion of all beneficiaries in each group who visited clinics and the mean number of visit days per beneficiary. Medical care expenditure per visit day was expressed as total costs, reimbursed amount, and patient's out‐of‐pocket payment. Data on January through June of 2008 were analyzed as compared with the same months of 2007. Raw difference‐in‐difference and multiple regression analyses were performed. The interaction coefficients, which measured the impact of cost‐sharing change, was −0.078 in model 1 and −0.039 in model 2 (P

Suggested Citation

  • Byoungjun Bae & Bo Ram Choi & Inmyung Song, 2018. "The impact of change from copayment to coinsurance on medical care usage and expenditure in outpatient setting in older Koreans," International Journal of Health Planning and Management, Wiley Blackwell, vol. 33(1), pages 235-245, January.
    • Handle: RePEc:bla:ijhplm:v:33:y:2018:i:1:p:235-245
    DOI: 10.1002/hpm.2416
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    Cited by:

    1. Eunja Park & Sookja Choi, 2020. "Who Benefits from the Fixed Copayment of Medical and Pharmaceutical Expenditure among the Korean Elderly?," IJERPH, MDPI, vol. 17(21), pages 1-11, November.
    2. Yeon-Hee Baek & Ju-Young Shin, 2018. "Trends in polypharmacy over 12 years and changes in its social gradients in South Korea," PLOS ONE, Public Library of Science, vol. 13(9), pages 1-17, September.
    3. SeungHoon Han & Hosung Sohn, 2023. "The short-term effects of fixed copayment policy on elderly health spending and service utilization: evidence from South Korea’s age-based policy using exact date of birth," International Journal of Health Economics and Management, Springer, vol. 23(2), pages 255-279, June.
    4. Diesty Anita Nugraheni & Satibi Satibi & Susi Ari Kristina & Diah Ayu Puspandari, 2022. "Factors Associated with Willingness to Pay for Cost-Sharing under Universal Health Coverage Scheme in Yogyakarta, Indonesia: A Cross-Sectional Survey," IJERPH, MDPI, vol. 19(22), pages 1-18, November.

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