Dr. Reger received his medical degree from the University of Oregon Health Sciences Center in 1980. He completed his internship at the Tucson Hospitals Medical Education Program and his residency in diagnostic radiology at the University of Arizona Health Sciences Center. Dr. Reger completed his fellowship in body imaging with neuroradiology at the University of Arizona.

Dr. Reger received his board certification from the American Board of Radiology in 1984. His professional memberships include the American College of Radiology, Radiological Society of North America, Pacific Northwest Radiological Association, and the American Association of Physicians and Surgeons. Dr. Reger was chief resident at the University of Arizona prior to joining Valley Radiologists in 1985.