Doctor density varies by specialty and location. The United States has 24 practicing allergy & clinical immunologists. Broken out by state, allergy & clinical immunology doctor density in Alabama is 1, in California is 6, in Colorado is 6, in District of Columbia is 3, in Florida is 8, in Georgia is 2, in Hawaii is 1, in Illinois is 4, in Iowa is 2, in Louisiana is 2, in Maryland is 1, in Massachusetts is 1, in Michigan is 1, in Missouri is 2, in New Jersey is 3, in New Mexico is 1, in New York is 8, in Ohio is 1, in Oregon is 1, in Pennsylvania is 8, in South Carolina is 1, in Tennessee is 4, in Texas is 4, in Utah is 1, and in Virginia is 1.