Physician Specialty Descriptions Following is a list of physician specialties followed by descriptions. Once you find the specialty you are looking for, click on one of the following links to find a physician. Find a physician by specialty Find a physician by name Custom search         Using This Directory: Click on the black triangle on the title bar to change the sort order. Click on a blue triangle to expand or collapse that category. Specialty Description Clinical and Laboratory Immunology is a subspecialty of Allergy and Immunology in which physicians are trained in all aspects of the administration of a clinical immunology laboratory to qualify them to perform laboratory tests to diagnose and treat disorders of the body's immune system. The American Boards of Allergy and Immunology, Internal Medicine, and Pediatrics issue certificates of Added Qualifications in Clinical and Laboratory Immunology.