Dr. Warren Allen graduated the medical school from the David Geffen School of Medicine and did his internship at the VA Medical Center. He completed his residency program at the Cedars-Sinai Medical Center and his fellowship at the Memorial Sloan-Kettering Cancer Center. Dr. Allen is specialized in pathology and board certified in anatomic & clinical pathology and Cytopathology. He has been in practice for more than 20 years and is affiliated with the Providence Saint John's Health Center. During his career, he has also contributed to several articles of medical interest.