Dr. Gregory Beaulieu is a pathologist practicing in Washington, DC. Dr. Beaulieu is a doctor who specializes in the study of bodily fluids and tissues. As a pathologist, Dr. Beaulieu can help your primary care doctor make a diagnosis about your medical condition. Dr. Beaulieu may perform a tissue biopsy to determine if a patient has cancer, practice genetic testing, and complete a number of laboratory examinations. Pathologists can also perform autopsies which can determine a persons cause of death and gain information about genetic progression of a disease.