Table 2. Key Barriers to Collaborative Drug Therapy Management (CDTM) Policy Implementation at 3 US Sites, May–July 2012.

Barrier	Case Study Site
	El Rio Community Health Center	Kerr Drug	Osterhaus Pharmacy
Lack of reimbursement for CDTM services	X	X	X
Provider hesitation to trust pharmacists to deliver expanded services through CDTM	X	X	X
Lack of administrative resources and time	X	X	X
Proliferation of informal collaboration		X	X
Limited physical space to provide care	X
Changing laboratory infrastructure		X
Difficulty in building relationships with providers		X
Limited access to patients’ clinical information			X
Patient challenges (eg, walk-in appointments, scheduling additional care)			X