Dr. Singleton is a board-certified anesthesiologist and immediate past president of the AAPS – Association of American Physicians and Surgeons. After being told “they don’t take Negroes at Stanford, she graduated from Stanford and earned her MD at UCSF Medical School. Dr. Singleton completed 2 years of Surgery residency at University of California at San Francisco Medical Center, and her Anesthesia residency at Harvard’s Beth Israel Hospital. She was on the faculty at Johns Hopkins Hospital in Baltimore, Maryland before returning to California for private practice at Cedars-Sinai Medical Center in Los Angeles and Alta Bates Medical Center in Berkeley. While still working in the operating room, she attended UC Berkeley Law School focusing on constitutional and administrative law. She interned at the National Health Law Project, and practiced insurance and health law. Dr. Singleton has published numerous articles, given presentations on health policy, and had many radio and television appearances. She started a blood pressure screening clinic at her church and make-shift clinics in two rural villages in El Salvador. Dr. Singleton ran for Congress in 2012.