Clinical and laboratory immunology is the study of disorders of the immune system, immunization and organ transplantation. A clinical and laboratory immunologist is a specialist who uses laboratory processes to discover immune system diseases. The immune system structure and function, and its defective responses are diagnosed and communicated to the physician in order to help manage patient problems.

Doctor density varies by specialty and location. The United States has 47 practicing clinical & laboratory immunologists. Broken out by state, clinical & laboratory immunology doctor density in Alabama is 1, in Arkansas is 1, in California is 7, in Colorado is 6, in District of Columbia is 3, in Florida is 7, in Georgia is 2, in Illinois is 2, in Iowa is 2, in Maryland is 2, in Massachusetts is 1, in Michigan is 1, in Missouri is 2, in New Jersey is 4, in New Mexico is 1, in New York is 9, in Ohio is 2, in Oregon is 1, in Pennsylvania is 10, in South Carolina is 2, in Tennessee is 4, in Texas is 5, in Utah is 1, in Virginia is 1, and in Washington is 1.