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Our Providers

Anne Kieryn, MD, Surgical Breast Oncologist, Medical Directorkieryn

Dr. Kieryn is a surgical breast disease specialist with special interest and experience in regional breast cancer treatment trends, liftetime cancer risk reduction, breast care community outreach and chronic breast pain. Dr. Kieryn recognizes the importance of personalized care in order to maintain the best quality of life possible for each patient. She encourages her patients to be involved throughout the whole process, especially when it comes to making informed decisions about their healthcare options.

Robin Anderson, CST, RN, CBPN-IC, Director of Oncology Services and Patient Navigator

andersonRobin is a certified breast patient nurse navigator in imaging and cancer. She received her training as a surgical technologist and worked in the OR as a surgical tech for three years while enrolled in the nursing program at Salt Lake Community College. After earning her RN license, she worked in the OR as a circulating nurse before becoming a nurse navigator. Her experience in the OR helped Robin to gain the experience she needed to comfortably step into the position of director of oncology services.

Gamma West Cancer Services

Brandon J. Fisher, DO

fisherDr. Fisher is a radiation oncologist. He specializes in all forms of radiation therapy ranging from the traditional form of external beam irradiation to stereotactic radiosurgery, brachytherapy and intensity modulated radiation therapy. Dr. Fisher sits on the Young Physicians’ Committee to the Board of Chancellors of American College of Radiation Oncology (ACRO) and on the International Committee, African workforce with the American Society of Radiation Oncology (ASTRO).

Roger S. Hansen, MD

hansenDr. Hansen is board certified in radiation oncology. He earned a Doctor of Medicine degree from Creighton University and trained in radiation oncology at the University of Arizona. Dr. Hansen has performed thousands of brachytherapy procedures. In addition to a busy clinical practice, he is active in training Radiation Oncologists from around the USA and Canada the techniques and rationale of modern brachytherapy implants. His primary interests are prostate, breast, endometrial, and cervix cancer.

Robert A. Harris, MD

harrisDr. Harris is board certified in radiation oncology and undersea and hyperbaric medicine. He trained at the National Cancer Institute in Bethesda, MD, and became an attending physician, serving as the Radiation Oncology Service Manager at the National Naval Medical Center. In that role, he helped start the first intensity modulated radiation therapy (IMRT) program in the Washington D.C. Metropolitan area. Dr. Harris has a wealth of experience in using modern radiation therapy techniques, which have been shown to improve treatment outcomes and minimize side effects.

John K. Hayes, Jr., MS, MD

hayesDr. Hayes is board certified in radiation oncology. He has been performing Brachytherapy procedures since 1988 and has performed over 2000 implants. Dr. Hayes is a native of Provo, UT. He received a BS degree in chemistry (Cum Laude) and a MS degree in physical chemistry from Brigham Young University. Dr. Hayes graduated with his Doctor of Medicine degree from the University of Utah, where he served his internship and residency in Radiation Oncology.

Mark W. Reilly, MD

reileyDr. Reilly is board certified in radiation oncology. He earned his Doctor of Medicine degree from Creighton University and completed a residency in radiation oncology at the Medical College of Wisconsin. He practiced for two years in Lafayette, LA; for nearly 14 years at Utah Valley Regional Medical Center and Central Utah clinic; and for two years at the Sletten Cancer Institute, where he gained crucial experience as the director of radiation oncology and co-director with a neurosurgeon of the CyberKnife program. He has been with Gamma West since September 2008.

Thomas B. Skidmore, MD

Dr. Skidmore attended the University of Utah, School of Medicine, where he developed a special interest in oncology. He completed his residency in radiation oncology at the Barrett Cancer Center at The University of Cincinnati, where he gained valuable experience in a wide range of cutting edge radiation therapy technologies, including image-guided intensity-modulated radiation therapy, stereotactic radiosurgery and high-dose rate brachytherapy. He served as the chief resident in radiation oncology and also was awarded a HDR brachytherapy fellowship through the American Brachytherapy Society.

Utah Cancer Specialists

Justin A. Call, MDcall

Dr. Call is board certified in internal medicine, hematology and medical oncology. He received his medical degree from the University of Colorado Health Sciences Center. He completed a residency in internal medicine and fellowship training in hematology and medical oncology at the University of Colorado Health Sciences Center. Dr. Call has served as the Physician Director of Cancer Research at Northern Michigan Regional Hospital.

Richard N. Frame, MD

frameDr. Frame is board certified in internal medicine and medical oncology. He earned his medical degree at Wayne State University and completed a residency at Henry Ford Hospital in Detroit, MI. He then completed fellowship training in cancer treatments at the University of Utah. Dr. Frame has practiced oncology along the Wasatch Front since 1987. He is former president of the American Cancer Society, Utah Division and served as Medical Chairman for Cancer Patient Advocacy Network of Community Oncology Alliance.

Urology Specialists of Utah

Daniel L. Hibbert, MD

Dr. Dan Hibbert’s professional experience has given him the ability to treat patients with the best procedures to ensure optimal results. He received his medical degree from The Ohio State University School of Medicine in Columbus, Ohio. Dr. Hibbert gained extensive experience in laparoscopic and robotic surgery during his urology residency at the University of Rochester Medical Center. Dr. Hibbert was recognized by the University of Rochester as an outstanding surgical educator in 2003. Ohio State University’s Division of Surgical & Anatomical Pathology gave him an award of excellence for his Pathology Fellowship.


  • Minimally Invasive Surgery
  • Kidney Stones
  • Prostate Disease
  • Incontinence
  • Urological Oncology
  • Infertility
  • Impotence/Erectile Dysfunction

ENT Center of Utah

Jason A. Diaz, MD

Dr. Jason A. Diaz received his Bachelor of Science degree in Business from Wake Forest University in 1998. He went on to get his MD from the Medical College of Georgia in 2003. Dr. Diaz completed both an internship in General Surgery and a residency in Otolaryngology at the University of Utah here in Salt Lake City. He then pursued a fellowship in Head & Neck Surgical Oncology and Microvascular Reconstruction at the University of Pensylvania. During his time in Philadelphia, he also served as Instructor of Otolaryngology at the Hospital of the University of Pennsylvania. In July of 2009, Dr. Diaz accepted a position as Assistant Professor of Head & Neck Surgical Oncology and Reconstruction within the Department of Otolaryngology at Washington University in St. Louis. He held that position for 5 years. In July of 2014, he moved his family and surgical practice to Utah.

His clinical interests include management of benign and malignant tumors of the head & neck, thyroid and parathyroid disease, melanoma and other advanced cutaneous malignancies, salivary gland disorders, paragangliomas, and other skull base tumors. He has special expertise in the fields of minimally-invasive transoral laser excision, transoral robotic surgery, and conservation laryngeal tumor resection.