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Healthgrades for ProfessionalsThe 10 Largest Health Systems in the US


The healthcare landscape in the United States continues to evolve, with hospital mergers and health system consolidation reshaping the market. Recent data from the American Hospital Association and Centers for Medicare and Medicaid Services (CMS) highlight significant trends in hospital ownership and system size.

Key Points:

  • The American Hospital Association reported 1,887 hospital mergers between 1998 and 2021.
  • HCA Healthcare leads as the largest health system with 184 affiliated hospitals, followed by the Veterans Health Administration with 172.
  • AdventHealth in Orlando, FL, tops the list of largest individual hospitals with 2,247 beds.
  • CMS data from 2016 to 2022 shows 347 changes in hospital ownership, compared to over 3,000 changes among skilled nursing facilities.
  • The top 10 largest health systems range from 61 to 184 affiliated hospitals.
  • The top 10 largest individual hospitals have between 1,133 and 2,247 beds.
  • CMS aims to enable research on how ownership changes impact care access, pricing, and quality.

HCN Medical Memo
The ongoing consolidation in the US healthcare sector stresses the importance of staying informed about market dynamics. These changes can potentially impact patient care delivery, resource allocation, and practice management strategies.


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