Pulmonology involves the study and treatment of respiratory diseases and disorders. A pulmonary physician, or pulmonologist, treats diseases of the lungs, airways, and all other respiratory organs. The pulmonologist diagnoses and treats pneumonia, asthma, bronchitis, emphysema and other respiratory problems, and uses a variety of invasive and non-invasive diagnostic techniques to help patients.

Physicians in this specialty treat patients suffering from numerous diseases and illnesses, but some of the most common are Emphysema, Broncho-Esophagology, Pneumonia, Lung Disorders, cystic fibrosis, Asthma, Bronchitis, and pectus excavatum.

Doctor density varies by specialty and location. California has 1,413 practicing pulmonary doctors / pulmonologists. Broken out by city, pulmonology doctor density in Sacramento is 70, in Saint Helena is 2, in Salinas is 8, in San Andreas is 1, in San Bernardino is 10, in San Clemente is 4, in San Diego is 108, in San Francisco is 100, in San Gabriel is 2, in San Jacinto is 1, in San Jose is 31, in San Juan Capistra is 1, in San Juan Capistrano is 2, in San Leandro is 2, in San Luis Obispo is 6, in San Marino is 2, in San Mateo is 5, in San Pablo is 6, in San Pedro is 2, in San Rafael is 2, in San Ramon is 3, in Santa Ana is 15, in Santa Barbara is 13, in Santa Clara is 3, in Santa Cruz is 9, in Santa Maria is 3, in Santa Monica is 24, in Santa Rosa is 13, in Saugus is 1, in Sepulveda is 1, in Sherman Oaks is 8, in Signal Hill is 2, in Simi Valley is 10, in Sonoma is 2, in Sonora is 2, in South San Francis is 4, in South San Francisco is 5, in Stanford is 41, in Stockton is 13, in Sun City is 2, in Sun Valley is 1, in Sunnyvale is 4, and in Sylmar is 5.

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.