DIAMOND was a collaborative effort of 9 health plans, 25 medical groups, and over 80 primary care clinics in Minnesota to implement and study Collaborative Care for depression. The AIMS Center provided consultation and coaching for the initiative. In addition, the National Institute of Mental Health (NIMH) awarded a $3 million grant to HealthPartners Research Foundation to study the DIAMOND initiative over five years. The study evaluated all aspects of DIAMOND, including effects of the program on patient satisfaction, productivity, and program cost-effectiveness. The project used a patient registry that tracks and measures patient goals and clinical outcomes, and facilitates treatment adjustment if a patient is not improving as expected.