Arizona Emergency Medical Systems, Inc. (AEMS), a 501(c)(3) non-profit, is a community-based, volunteer organization dedicated to improving emergency medical services (EMS) and trauma care for the Central Arizona region (which includes Maricopa, Pinal, and Gila counties).

Since 1975, AEMS has been bringing together physicians, nurses, EMTs, paramedics, and hospital administrators to ensure that emergency medical care is delivered in a coordinated manner, and moreover, that it is meeting the needs of the public.