Pediatric hematology/oncology is the study and treatment of blood disorders and cancer in infants, children and adolescents. A pediatric hematologist-oncologist is a physician who specializes in treating children with chemotherapy, and consults with other physicians to coordinate other methods of cancer treatments. This specialist uses a background of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.

Doctor density varies by specialty and location. California has 319 practicing pediatric hematologists / oncologists. Broken out by city, pediatric hematology / oncology doctor density in Anaheim is 1, in Arroyo Grande is 1, in Auburn is 1, in Bakersfield is 4, in Bell is 1, in Bellflower is 2, in Berkeley is 3, in Beverly Hills is 1, in Burbank is 1, in California Hot Springs is 1, in Chula Vista is 2, in Coronado is 2, in Downey is 2, in Duarte is 13, in Encinitas is 2, in Encino is 2, in Escondido is 2, in Fairfield is 1, in Folsom is 1, in Fontana is 3, in Fountain Valley is 4, in Fresno is 1, in Gilroy is 1, in Glendale is 3, in Hayward is 1, in Huntington Beach is 2, in La Jolla is 2, in La Mesa is 1, in Laguna Hills is 1, in Lakeport is 1, in Lancaster is 1, in Loma Linda is 11, in Long Beach is 8, in Los Alamitos is 2, in Los Altos Hills is 1, in Los Angeles is 97, in Madera is 6, in Montebello is 2, in Moreno Valley is 2, in Murrieta is 1, in Napa is 1, in National City is 1, in Oakland is 26, in Oceanside is 2, in Orange is 19, in Palm Springs is 1, in Palo Alto is 35, in Panorama City is 1, in Pasadena is 1, in Piedmont is 1, in Pleasanton is 2, in Porterville is 1, in Rancho Mirage is 1, in Riverside is 1, in Roseville is 1, in Sacramento is 19, in Salinas is 1, in San Diego is 26, in San Francisco is 35, in San Jose is 1, in Santa Ana is 1, in Santa Barbara is 2, in Santa Clara is 3, in Santa Monica is 3, in Santa Rosa is 1, in Stanford is 12, in Torrance is 5, in Travis Afb is 2, in Vacaville is 1, in Valencia is 1, in Vallejo is 1, in Ventura is 3, in Walnut Creek is 6, in West Covina is 1, in West Hollywood is 2, in Westlake Village is 1, in Woodland Hills is 1, and in Yucaipa is 1.

California’s population is 36,142,137, and it is America’s third largest and most populous state. It also claims the highest and lowest altitudes in the lower 48 states. The lowest point in the country, Death Valley, is also home to the nation’s highest recorded temperature, 134 degrees. Tourists flock to this state for its many outdoor activities and attractions, including Universal Studios, Disneyland, Rodeo Drive shopping, the Golden Gate Bridge in San Francisco, wine country tours, and California’s numerous beaches and parks. Los Angeles is the nation’s second largest city, but California’s capital is Sacramento. The giant sequoias in California’s forests are among the oldest living things in the world, and a redwood in the Redwood National Park is said to be the world’s tallest tree, at 365 feet. California achieved statehood in 1850, and was named the Golden State after the beginning of the Gold Rush in 1848.

According to 2005 Census estimates, California has a population of 36,132,147. Of this population, 9,308,563 are under the age of 18 and 3,827,038 are at or above the age of 65.