Collaborative care has increased dramatically in the past decade, yet the variability in collaborative strategies and the diversity of settings in which collaboration is being implemented make it difficult to assess quality and outcomes. Therefore, three aims were addressed in the current study: (a) describe and characterize the sites in the Collaborative Care Research Network (CCRN), (b) identify factors associated with practices' self-identified collaborative care model (e.g., coordinated, integrated, care management), and (c) identify limitations of available survey data elements so as to propose additional elements for future surveys. Initial (CCRN) sites completed surveys regarding several organizational factors (e.g., setting type, size of patient population, number of behavioral health providers). Results from 39 sites showed significant heterogeneity in self-identified type of collaborative care model practiced (e.g., integrated care, coordinated care), type of practice setting (e.g., academic, federally qualified health center, military), size of clinic, and ratio of behavioral health providers to medical providers. This diversity in network site characteristics can provide a rich platform to address a number of questions regarding the current practice of collaborative care. Recommendations are made to improve future surveys to better understand elements of the patient-centered medical home and the role it may play in outcomes. (PsycINFO Database Record (c) 2012 APA, all rights reserved).