Physician Directory - 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. Using This Database: Click on the triangles on the Specialty Title Bar to toggle between ascending and descending sort order. Click on a blue triangle to expand or collapse that category. Specialty Description Allergists are physicians trained to diagnose and treat reactions due to irritating agents or allergens. Allergic reactions can result from unusual sensitivities to medicines, foods, pollens, and other substances. Expand | Collapse