Accountable Care Organizations

Accountable Care Organizations
Name	Accountable Care Organizations
Type	Health care delivery model
Founded	2010s
Country	United States
Key people	Kathleen Sebelius, Donald Berwick, Tom Price, Seema Verma

Accountable Care Organizations are networks of healthcare providers created to coordinate patient care across settings with the goal of improving quality of care and reducing healthcare costs. Originating in policy efforts to reform Medicare and United States health care reform, they align incentives among hospitals, physician group practices, and other health system participants using shared savings and performance benchmarks. ACOs interact with multiple federal agencys, state governments, and private insurance companys in varied contractual forms.

Overview

ACO models bring together hospitals, physicians, nurses, clinicians, and allied health professionals to manage care for attributed populations enrolled in programs like Medicare Shared Savings Program, Medicare Advantage, and private commercial insurance contracts. Common participants include integrated delivery networks such as Kaiser Permanente, academic medical centers like Mayo Clinic and Cleveland Clinic, and independent practice associations such as Sutter Health and Geisinger Health System. ACOs employ population health tools from vendors including Epic Systems Corporation, Cerner Corporation, and Allscripts and collaborate with payers such as UnitedHealth Group, Aetna, Cigna, Anthem, Inc. and Blue Cross Blue Shield Association. Policy impetus has involved lawmakers such as Barack Obama and administrators from Centers for Medicare & Medicaid Services offices under leaders including Donald Berwick and Tom Price.

History and Development

Early precursors to ACOs trace to integrated systems like Group Health Cooperative and the prepaid models of Kaiser Foundation Hospitals. Legislative and regulatory milestones include the Affordable Care Act passage, administrative rulemaking by Centers for Medicare & Medicaid Services, and program launches in the 2010s. Pilot projects and demonstrations involved agencies and programs such as Center for Medicare and Medicaid Innovation, Medicare Shared Savings Program, and demonstrations run by state agencies like Massachusetts Health Connector and California Department of Health Care Services. Prominent health systems that formed early ACOs include Partners HealthCare (now Mass General Brigham), Johns Hopkins Medicine, and Mount Sinai Health System. International comparisons reference systems like the National Health Service reforms in United Kingdom and integrated care experiments in Netherlands and Australia.

Structure and Governance

Governance structures vary from board-led models with representation from hospitals, physician groups, and payer partners to clinician-run cooperative models inspired by Mayo Clinic governance. Legal forms include accountable entity arrangements, limited liability companies, and partnership contracts involving institutions such as Community Health Systems and HCA Healthcare. Clinical leadership often includes chief medical officers drawn from organizations like Johns Hopkins Hospital or Mass General Hospital, while administrative leadership may involve executives formerly from Aetna or UnitedHealth Group. Governance must address antitrust considerations involving the Department of Justice and the Federal Trade Commission and interact with state departments such as the New York State Department of Health and California Attorney General offices.

Payment Models and Financial Incentives

ACO payment frameworks include shared savings, shared risk, global capitation, and bundled payment arrangements linked to programs like the Bundled Payments for Care Improvement initiative. Contracts with payers such as Medicare (including Medicare Shared Savings Program tracks), Medicaid agencies in states like Oregon, and commercial insurers like Cigna or Anthem, Inc. incorporate quality bonuses and downside liability. Financial modeling often references actuarial work from firms including Milliman and Mercer. Reimbursement reforms intersect with legislation like the Balanced Budget Act and are influenced by budgetary oversight from Congress and scoring by the Congressional Budget Office.

Quality Measurement and Performance

ACO performance is measured using metrics established by Centers for Medicare & Medicaid Services and endorsed by National Quality Forum measures covering care coordination, preventive health, patient experience (including Consumer Assessment of Healthcare Providers and Systems), and outcomes such as hospital readmissions and mortality. Data sources include electronic health record systems from Epic Systems Corporation and claims datasets from Centers for Medicare & Medicaid Services. Quality reporting interacts with standards from Joint Commission accreditation and reporting initiatives like Physician Quality Reporting System and certification programs run by National Committee for Quality Assurance. Academic evaluation has been conducted by researchers at Harvard Medical School, Johns Hopkins University, Stanford University, and University of Pennsylvania.

Regulatory and Legal Issues

Legal oversight spans federal regulatory frameworks including Antitrust laws enforced by the Department of Justice and Federal Trade Commission, and statutory requirements under Affordable Care Act provisions administered by Centers for Medicare & Medicaid Services. Liability, Stark Law waivers, and Anti-Kickback Statute considerations have involved rulemaking and guidance from Department of Health and Human Services and opinions from state attorney general offices like those in New York and California. Enrollment and compliance require interaction with Internal Revenue Service rules for tax-exempt hospital partners and contracting standards under state insurance regulators such as the New Jersey Department of Banking and Insurance.

Criticisms and Challenges

Critiques by scholars at institutions like The Brookings Institution, RAND Corporation, and Urban Institute address issues including consolidation of market power among systems such as CommonSpirit Health and Tenet Healthcare, potential anti-competitive effects flagged by the Federal Trade Commission, uneven savings reported in evaluations by Medicare Payment Advisory Commission and investigators at Harvard T.H. Chan School of Public Health, and administrative burdens highlighted by American Medical Association and specialty societies including the American College of Physicians. Challenges include physician engagement problems documented in studies from Dartmouth College, disparate outcomes across regions such as Texas and Vermont, and interoperability issues involving vendors like Epic Systems Corporation and Cerner Corporation.

Category:Health care delivery