Table 1.

Descriptive characteristics of ACOs that are existing organizations, some new partners, and all new partners; data from the National Survey of Accountable Care Organizations

	Existing organization (N=51)	Some new partners (N=74)	All new partners (N=150)	Chi-square or F-statistic
Composition
Hospital in ACO	0.69	0.75	0.57	7.1*
CHC in ACO	0.16	0.41	0.29	8.4*
Nursing facility in ACO	0.33	0.34	0.20	5.8+
Integrated Delivery system	0.67	0.58	0.45	8.5*
Physician groups only	0.16	0.13	0.33	13.2**
Physicians
Total physicians (FTE)	521	517	324	4.2*
Percent physicians that are PCPs	0.52	0.54	0.64	4.6*
Services offered within the ACO
Primary care	0.98	0.95	0.98	2.3
Routine specialty care	0.72	0.63	0.61	1.8
Highly specialized care	0.13	0.24	0.16	2.9
Hospital inpatient care	0.62	0.65	0.59	0.92
Emergency Care	0.63	0.63	0.53	2.4
Urgent care	0.66	0.58	0.60	0.83
Inpatient rehab	0.51	0.45	0.42	1.2
Outpatient rehab	0.55	0.49	0.40	3.7
Behavioral health	0.43	0.40	0.46	0.82
Skilled nursing	0.19	0.18	0.22	0.51
Pediatric health	0.75	0.52	0.52	8.4*
Palliative or hospice care	0.56	0.45	0.39	4.2
Home health	0.48	0.38	0.35	2.6
Outpatient pharmacy	0.45	0.30	0.23	8.8*
Dental	0.00	0.13	0.10	4.4
Contracts
Medicare ACO contract	0.69	0.78	0.81	3.6
Medicaid ACO contract	0.35	0.26	0.18	6.5*
Private payer ACO contract	0.86	0.64	0.52	19.1***
Multipayer ACO	0.71	0.67	0.54	8.4*
Have a contract with downside risk	0.51	0.31	0.15	27.7***

Note:

⁺indicates p<0.10;

^*indicates p <0.05;

^**indicates p <0.01;

^***indicates p <0.001