Table 2.

Characteristics of 5 Participating Health Care Organizations (HCO)

Characteristic	HCO-A	HCO-B	HCO-C	HCO-D	HCO-E
Organizational type	Medical group	Medical group	Medical Group	Behavioral health network	Insurer
Insurance products	Fee for service	None	None	Capitated	Capitated, fee for service
Affiliated practices, No.	139	21	87	65	296
Practices owned, %	30	100	100	0	0
Total clinicians, No.	400	160	186	921	>700
Approximate patient populations, No.	>500,000 served	>100,000 served	320,000 served	>100,000 enrolled	2.3 million enrolled
Mental health carve-out, %	25	60	70	100	0
Practices from HCO participating in the study, No.	19	10	14	8	9
Among participating practices
Clinicians per practice, No. (range)	3.0 (2–6)	3.6 (2–7)	2.9 (1–6)	8.8 (2–11)	2.6 (1–4)
Clinicians participating, %	77	95	69	43	83
Practices with on-site mental health services, No. (%)	4 (21)	4 (40)	0 (0)	8 (100)	0 (0)