Oncology

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Dr. Annie Callahan is a board-certified surgical oncologist and general surgeon with extensive experience in complex cancer care and community-based surgical practice. She currently serves as a Surgical Oncologist with South Bay Surgeons in Torrance, California, a position she has held since February 2025, where she provides surgical oncology and general surgery services across three high-volume community hospitals in the Los Angeles area. Dr. Callahan earned her Bachelor of Arts in Anthropology/Biology from Mount Holyoke College, graduating magna cum laude...
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Dr. Ragab is a premier, nationally-recognized, board-certified, and fellowship-trained radiation oncologist with additional fellowship training in brachytherapy. Dr. Ragab holds an MD degree from the University of Southern California, and completed residency training in Radiation Oncology at the LAC+USC medical center followed by a brachytherapy fellowship at UCLA. He was on faculty at USC Norris Cancer Hospital for six years, prior to transitioning to the Dept of Veterans Affairs. He is extensively published in bench, clinical, and biopsychosocial oncologic care....
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Dr. Sabha Ganai is a GI/HPB surgical oncologist and clinical leader with extensive expertise in cancer disparities, surgical ethics, and complex oncologic procedures. She currently serves as Director of Quality and Safety in the Department of Surgery at Los Angeles General Medical Center and as an Associate Professor of Clinical Surgery at the University of Southern California Keck School of Medicine. Dr. Ganai earned her Doctor of Medicine from the University of Southern California Keck School of Medicine in 2001,...