Description: Maricopa County Medical Society (MCMS) is a physician-led, membership-based professional association in Maricopa County, Arizona, founded in the 19th century. Its mission is to promote excellence in quality of care and community health and to represent and serve member physicians by providing advocacy, education, practice support and a collective physician voice on local and state health matters. Type: Non-profit professional association / medical society Policies: Advocacy on physician practice and professional issues, health care regulation, reimbursement and insurance policy, scope-of-practice and workforce matters, public health and preventive care initiatives, telemedicine and health IT, medical liability and malpractice reform, medical education and training, and community health/ social determinants of health programs. Funding: Primarily funded by member dues and subscriptions, continuing medical education and event fees, corporate sponsorships and program revenue, and charitable grants and donations (including support via the MCMS Foundation). Affiliates: Commonly partnered organizations include the Arizona Medical Association and American Medical Association, the MCMS Foundation, regional health systems and hospitals in the Phoenix area (e.g., Banner Health, Mayo Clinic Arizona, Dignity Health) and local medical education institutions such as Arizona State University and the University of Arizona.