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Edward L. Middleman, MD was the founder of Dallas Oncology Consultants. He was a graduate of the University of Pittsburgh and the University of Pittsburgh Medical School. He completed his internal medicine training at the Montefiore Hospital and the Presbyterian University Hospital in Pittsburgh. After completing his Oncology fellowship from the University of Texas M.D. Anderson Hospital and Tumor Institute, Dr. Middleman has served as chief and medical director positions at many of these institutions. Dr. Middleman opened their first office at Methodist Dallas Medical Center in 1996, under the Moniker of Dallas Oncology Consultants, or DOC's. DOC's initially confined its hematology/oncology program to the patients of the Methodist Healthcare Systems.

From the beginning, an overriding philosophy of DOC's had been to make care available to as many patients as possible. In 2008 DOC's expanded its practice which led to the birth of Cancer Institute of Dallas or CID. In early 2013 Edward L. Middleman, MD retired from practicing medicine to travel and spend more time with his family. At which time CID became a part of the HealthTexas Provider Network, A Baylor-HealthTexas Affiliate. Today, CID is operated by licensed medical staff, is board-certified in the broad range of oncology and hematology practice areas and employs a full-time nurse practitioner and full-time physicians, all who are dedicated to the care of hematologic and oncologic. The practice has also expanded to three offices including hospitals beyond the Methodist Healthcare System in conjunction with Baylor Healthcare System.