Developing strong professional collaborations with physicians can improve patient outcomes and benefit both the physician's and the pharmacist's practices. The five-stage CWR model provides a framework to guide pharmacists in advancing their professional relationships with physicians. To develop successful collaborations, pharmacists must be ready to take the initiative and tailor their services to the needs of physicians in their communities. Once the professional relationship is well established, entering into a CPA can enhance the image of the pharmacy and ensure a more predictable base of patients.