Health Systems and High-Need Populations: The Effect of Vertical Integration on Utilization, Spending, and Quality for Medically ComplexPatients

卫生系统和高需求人群:垂直整合对医疗复杂患者的利用、支出和质量的影响

基本信息

  • 批准号:
    10660622
  • 负责人:
  • 金额:
    $ 39.95万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
  • 财政年份:
    2023
  • 资助国家:
    美国
  • 起止时间:
    2023-04-01 至 2027-01-31
  • 项目状态:
    未结题

项目摘要

PROJECT SUMMARY Medical care in the United States is increasingly delivered in health systems—which the Agency for Healthcare Research and Quality has defined as organizations with at least one hospital and one physician group providing comprehensive care that operate through common ownership or joint management. In the past decade, health system acquisition of physician practices has increased markedly; more than half of U.S. physicians are now affiliated with one of 637 health systems. Prior research has found that vertical integration can lead to higher commercial health care prices, but has uncertain effects on quality, spending, and utilization for Medicare beneficiaries. Little is known about how health system expansion influences care for medically complex Medicare patients, a distinct population that has high health needs and frequent interactions with the medical system. The long-term goal of the proposed research is to determine whether the growth of health systems improves care for medically complex patients and what health system strategies and characteristics contribute to their success or failure in doing so. The overall objective of this project is to provide health care leaders and policymakers with an understanding of whether and how health systems change the delivery and quality of care for medically complex Medicare beneficiaries, with a focus on patients in acquired primary care practices. The central hypotheses are that, on average, health system acquisition of practices improves care for medically complex patients, but that improvement varies across health systems. These hypotheses will be tested by pursuing three specific aims: (1) determine the impact of health system acquisition of primary care practices on utilization, spending, and quality for medically complex patients (overall and for three subpopulations); (2) examine variation by health system in spending and quality changes for medically complex patients at acquired practices, and identify characteristics of systems that most improve their care; and (3) understand how the experiences of physicians and the efforts of health system leaders differ at systems that improve care for medically complex patients at acquired practices from those that do not. This project will use Medicare claims data and qualitative data collected by the researchers. Methodologically, it will employ rigorous quasi-experimental approaches including difference-in-differences analyses, as well as in- depth, semi-structured interviews with health system leaders and practicing physicians. The proposed research is innovative, in the applicants' opinion, because it fills critical gaps about whether, which, and how health system acquisitions improve care for medically complex patients. It will also build on AHRQ's prior investment in developing a Compendium of U.S. Health Systems, and make an expanded database publicly available for other researchers to use. The project is significant because it will provide rigorous evidence on the impact of vertical integration across a range of quality, utilization, and spending outcomes and will identify strategies that may improve the design of health systems to create a higher value medical system.
项目总结

项目成果

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