Dr. David Fay Christianson, MD

Dr. David Christianson is an oncologist who also practices internal medicine, bringing over three decades of experience to cancer care. He earned his medical degree from the University of Oklahoma College of Medicine and has dedicated 33 years to helping patients navigate complex oncological conditions. Dr. Christianson speaks English and provides comprehensive care that bridges cancer treatment with broader internal medicine expertise.

Dr. Christianson practices at St Vincent Regional Hospital and maintains locations in both Missoula and Billings, Montana. He specializes in treating breast cancer, including advanced cases that are metastatic or recurrent. His practice also addresses Paget disease of the breast, a rare form of breast cancer. Dr. Christianson performs diagnostic procedures such as CT scans and blood work including complete blood counts to monitor patient health throughout treatment.