Accountable Care Organizations 2 Hospital Administration 2 Hospitals 2 Humans 2 United States 2 accountable care organization 2 hospital 2 hospital management 2 hospitals 2 human 2 medicaid 2 medical information 2 medical society 2 medicare 2 organization and management Centers for Medicare and Medicaid Services, U.S. 1 Cluster Analysis 1 Delivery of Health Care, Integrated 1 Hospital Shared Services 1 Medicare 1 Medicare Shared Savings Program 1 Pioneer Accountable Care Organizations 1 accountable care organizations 1 ambulatory care 1 article 1 classification 1 cluster analysis 1 environmental factor 1 general practitioner 1 hospital service 1