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 Pathologists are physicians who specialize in laboratory medicine. They are experts in the use of laboratory procedures to diagnose and treat disease. A pathologist assists physicians in determining what medical problems their patients may have or what further procedures may need to be performed in order to make the determination. The pathologist may also help a patient’s doctor in deciding how a condition can best be treated.