Emergency Medical Services Authority
Emergency Medical Services Authority (EMSA) is Oklahoma’s largest provider of pre-hospital emergency medical care. EMSA was established as a not-for-profit public trust authority in Tulsa in 1977. In 1990, Oklahoma City joined the EMSA system creating what is now known as EMSA’s Western Division: Arcadia, Lake Aluma, Nichols Hills, Oklahoma City, The Village & Valley Brook. and Eastern Division: Jenks, Sand Springs & Tulsa.