Medstar Ambulance of Mendocino County Inc., a 501(c)(3) non-profit public charity doing business as Ukiah Ambulance, is the primary provider of ground advanced life support (ALS) treatment and transport in the cities of Ukiah and Willits, California and surrounding unincorporated areas, including the towns of Boonville, Brooktrails, Calpella, Covelo, Hopland, Navarro, Philo, Potter Valley, Redwood Valley, Talmage and Yorkville. In our primary response area of 850 square miles, Medstar serves an approximate population of 57,224.