Dr. Glenn Geoffrey Preston, M.D. Internal Medicine - Hematology & Oncology Medicare: Accepting Medicare Assignments Practice Location: 1200 1st Ave E, Abben Cancer Center, Spencer, IA 51301 Phone: 712-264-6550 Fax: 712-264-6553
Hematology & Oncology: An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.