Table 1.

Organizational Characteristics of Study Accountable Care Organizations (ACOs)

Name	Organization Type	Payer (Approx. Lives Covered)	Medicare ACO Type	Geographic Location
Park Nicollet Health Services	Integrated delivery system	Medicare (16,000) and additional risk-based commercial payer contract	Pioneer	Minneapolis, MN
Triad Healthcare Network	Clinically integrated network of physicians affiliated with Cone Health	Medicare (38,000) with plans for contracts with commercial payers	Medicare Shared Savings Program	Greensboro, NC
District Medical Group	Medical group affiliated with the University of Arizona College of Medicine - Phoenix	No formal ACO contract signed but targeting Medicaid and commercial payers (contracts signed in 2014)		Phoenix, AZ
John Muir Health	Integrated delivery system	Blue Shield (16,000) and Medicare (7,000)	Medicare Shared Savings Program	Walnut Creek, CA
Atrius Health	Alliance of six medical groups	Medicare (25,000) and Blue Cross Blue Shield Alternative Quality Contract (106,000)	Pioneer	Boston, MA
Carilion Clinic	Integrated delivery system	Aetna (50,000) and Medicare (not started at time of interview)	Medicare Shared Savings Program	Roanoke, VA
Methodist Patient Centered ACO	Hospital system with primary care clinics	Medicare (13,000)	Medicare Shared Savings Program	Dallas, TX
Multicare Health System	Integrated delivery system	Medicaid managed care (20,000); contracts with Blue Cross planned		Tacoma, WA
Brown and Toland	Independent practice association	Blue Shield (21,000); Cigna (1,500); Aetna (1,500); Medicare (18,000)	Pioneer	San Francisco, CA
Coastal Medical	Medical group	Blue Cross Blue Shield of Rhode Island (33,000); Medicare (8,000); two other commercial contracts planned	Medicare Shared Savings Program	Providence, RI
Advocate Health Care	Nine physician hospital organizations	Blue Cross Blue Shield (250,000) and Medicare (114,000)	Medicare Shared Savings Program	Oak Brook, IL