Palomar Health is a California health care district in San Diego County. It operates Palomar Medical Center in Escondido (opened 2012), Pomerado Hospital in Poway, and many other locations. Covering 800 square miles (2,100 km2), Palomar Health is California's largest health care district by area. The district was formed in 1984, replacing the Escondido Valley Hospital Association which itself was formed in 1945.