He completed a residency in obstetrics/gynecology at Kaiser Foundation Hospital/Martin Luther King Hospital in Los Angeles, California in 1978, and is currently a member of the Mississippi State Medical Association, the Coast County Medical Association, and the American Medical Association. As the medical director of Gulf Coast Women's Clinic in Gulfport, Dr. Booker asserts his own interests and the interests of his patients, whom he alleges are irreparably harmed by the challenged statutory scheme.