Our doctors


Dennis Palmer, M.D.

Dennis Palmer, M.D., was born and raised in Great Falls, Montana. After graduating from Montana State University in Billings with high honors, he attended the University of New Mexico Medical School in Albuquerque, New Mexico. He did a surgical internship in Denver, Colorado and subsequently went to University of California-Irvine for Diagnostic Radiology residency. 

During his senior year he served as Chief Resident. He subsequently transferred to UCLA at their St. Mary’s Long Beach Hospital where he did a year of Interventional and Cardiovascular Radiology Fellowship. He subsequently took a job in San Diego, California at Grossmont District Hospital and was an interventional radiologist for 7 years, prior to coming home to Montana. He has practiced since that time at St. Peter’s Community Hospital in Helena, Fort Harrison Veteran’s Hospital, and St. James Community Hospital in Butte, Montana.

He currently belongs to the Society of Interventional Radiology, Radiologic Society of North America, and the American College of Radiology. In addition, he is currently a member of the Western Angiographic and Interventional Society, of which he has been the past president, as well as program director.

He has raised his family in Helena, Montana, and enjoys being back in Montana and all of the amenities it has to offer. His interests include fishing, hunting, boating, and skiing. He has been involved in many of the community-related functions within Helena. He took great pride and pleasure in coaching the Helena High School hockey team, his daughter’s softball teams, as well as his son’s wrestling, basketball, baseball, and football teams.


Randy R. Sibbitt, M.D.

Randy Sibbitt, M.D. has specialty focus areas of practice including: Neuroradiology, Interventional Radiology, Mammography, Interventional Ultrasound, MRI, and Musculoskeletal Imaging.

His education includes a BA in chemistry and MD in medicine through the University of New Mexico in Albuquerque. He also has internship/residency through the University of Southern California/LA County Hospital Family Practice and University of California Davis Diagnostic Radiology.​

Dr. Sibbitt has fellowship through the University of Texas San Antonio- Interventional Radiology Fellowship and the University of Mexico Medical Center- MRI/Neuroradiology​


Dr. Sibbitt is Assistant Professor of Radiology – Univ of Texas San Antonio, has over 33 published scientific papers and many guest lectures, and has 2 patents on medical devices. He also has a Senior membership in the American Society of Neuroradiology, Western Society of Neuroradiology, Western Society of Interventional Radiology, Society of Magnetic Resonance in Medicine, Radiological Society of North America, and the American Roentgen Ray Society.


Dr.  Sibbitt and Debby, his wife of 32 years, have lived in Helena for the last 19 years ,  where they raised their twin daughters who played volleyball for capital HS and subsequently attended U of M and MSU.