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 1,365 practicing pulmonary doctors / pulmonologists. Broken out by city, pulmonology doctor density in Anaheim is 40, in Apple Valley is 4, in Arcadia is 18, in Arcata is 2, in Auburn is 2, in Bakersfield is 16, in Berkeley is 14, in Beverly Hills is 22, in Burbank is 13, in Burlingame is 10, in Camarillo is 6, in Chico is 4, in Chula Vista is 9, in Corona is 5, in Culver City is 4, in Daly City is 10, in Davis is 5, in Downey is 10, in Encinitas is 5, in Escondido is 8, in Fountain Valley is 16, in Fremont is 7, in Fresno is 24, in Fullerton is 10, in Garden Grove is 6, in Gilroy is 4, in Glendale is 19, in Glendora is 7, in Grass Valley is 1, in Hawthorne is 4, in Hemet is 1, in Huntington Beach is 8, in Indio is 1, in Inglewood is 4, in Irvine is 6, in La Mesa is 11, in La Palma is 1, in Laguna Hills is 8, in Lakeport is 1, in Lakewood is 3, in Lancaster is 5, in Lodi is 6, in Long Beach is 26, in Los Alamitos is 6, in Los Angeles is 177, in Los Gatos is 8, in Lynwood is 4, in Marysville is 5, in Mission Viejo is 5, in Modesto is 11, in Montclair is 7, in Monterey is 1, in Monterey Park is 9, in Mountain View is 9, in Napa is 2, in Needles is 1, in Newport Beach is 21, in Novato is 4, in Oakland is 17, in Oceanside is 4, in Orange is 36, in Oxnard is 8, in Palm Springs is 9, in Palo Alto is 29, in Pasadena is 26, in Pinole is 3, in Pleasanton is 7, in Pomona is 13, in Rancho Mirage is 6, in Redding is 10, in Redondo Beach is 3, in Redwood City is 7, in Riverside is 14, in Roseville is 10, in Sacramento is 71, in San Bernardino is 9, in San Clemente is 4, in San Diego is 105, in San Francisco is 99, in San Jose is 32, in San Juan Capistrano is 2, in San Mateo is 6, in San Pablo is 6, in Santa Ana is 15, in Santa Barbara is 12, in Santa Cruz is 9, in Santa Monica is 24, in Santa Rosa is 11, in Signal Hill is 2, in Simi Valley is 9, in Sonoma is 2, in Stockton is 12, in Temecula is 3, in Thousand Oaks is 12, in Torrance is 37, in Visalia is 6, in Walnut Creek is 19, in Watsonville is 2, in Whittier is 7, and in Yuba City is 2.

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.