MPROVING THE QUALITY OF MENtal health care requires continued efforts to move evidence-based treatments of proven efficacy into real-world practice settings with wide variability in patient characteristics and clinician skill. 1 The effectiveness of one approach, collaborative care, is well established for primary care depression, 2-5 but has been infrequently studied for anxiety disorders, 6,7 despite their common occurrence in primary care. 8 The multiplicity of anxiety disorders and the fact that anxious patients are less likely to seek 9 and harder to engage 10 in treatment may be contributing factors. Furthermore, whereas effective treatment for both anxiety and depressive disorders relies in part on pharmacotherapy, psychosocial treatments such as cognitive behavioral therapy (CBT) are important for pa-tients who are anxious. Not only do these patients strongly prefer psychological treatment over medications, 10,11 but also CBT may have ad-Author Affiliations are listed at the end of this article.