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Denver’s Leading Oncologists

Seeking treatment with Littleton Radiation and Medical Oncology’s leading specialists guarantees you’ll receive the treatment and care you deserve with our oncologists’ medical expertise and compassionate bedside manner. Effective cancer treatment starts with our oncologists; learn more about their medical experience below:


David Schreiber, M.D.

dr-schreiber-150x193Dr. David Schreiber is the CEO and medical director of Littleton Radiation and Medical Oncology, which he founded in 1987. Dr. Schreiber has been in practice in the Denver area since 1985 and has been a radiation oncologist since 1982. Dr. Schreiber’s goal is to provide state-of-the-art radiation oncology services in a setting that is comfortable and caring.

Dr. Schreiber was the Medical Director of the Department of Radiation Oncology at Porter Memorial Hospital in Denver; served as Assistant Clinical Professor of Radiation Oncology at the University of Colorado Medical School in Denver and was Chief Resident of the Division of Radiation Therapy in the Department of Radiology at Stanford University Medical Center in Stanford, California.

He earned his bachelor’s degree at Stanford University and his medical degree at the Bowman Gray School of Medicine at Wake Forest University.


Douglas B. Tippin, M.D., Ph.D.

dr-tippin-150x194Dr. Douglas Tippin was born and raised in the U.S. Army. He earned his bachelor’s and master’s degrees in chemistry from Baylor University in 1988 and 1990. In 1997, he completed his M.D./Ph.D. fellowship at Ohio State University before starting his internship and residency in internal medicine at the University of Chicago. Dr. Tippin received his radiation oncology training at the University of Chicago and the James Cancer Hospital, were he sub-specialized in intra-operative radiation and brachytherapy cancer treatments (surgically-based radiation treatments). Dr. Tippin relocated to the Denver area in 2002 and enjoys skiing, hiking and yoga.