Dr. Kyle Work joined the Cancer Centers of Colorado at St. Mary?s Medical Center oncology team in 2018. He is a hematologist-oncologist. Dr. Work treats all types of cancers with a special interest in head and neck cancer, lung cancer and genitourinary cancers.Dr. Work is originally from Tulsa, Oklahoma where he graduated from the University of Tulsa with a degree in biology, and earned his medical degree at Oklahoma State University. He then moved to Kansas City where he completed his internal medicine residency and hematology / oncology fellowship at the University of Kansas Health System. During his hematology and oncology fellowship, he served as chief fellow for two years.Dr. Work�is an investigator involved in clinical research trials in the area of hematology and medical oncology. His clinical research focus includes�head and neck cancers,�brain and lung cancers.�When he is not working, he enjoys mountain biking, camping, and hiking with his wife and golden retrievers. Dr. Work is rated as an Advanced provider by MediFind in the treatment of Ependymoma. His top areas of expertise are Lung Cancer, Pleuropulmonary Blastoma, Squamous Cell Lung Carcinoma, and EGFR Positive Lung Cancer.

Dr. Kristen Riegert holds a Bachelor of Science in Biology from Pacific University in Forest Grove, OR, and a Doctor of Medicine from Oregon Health & Science University in Portland. She completed an internal medicine internship with Providence Portland Medical Center and a radiation and oncology residency with the University of Arizona in Tucson. In 2014, Dr. Riegert began working as a radiation oncologist at a Walla Walla, WA hospital. She spent the next two decades there. In 2024, she moved to Grand Junction, CO, and joined Intermountain Health.She enjoys hiking, camping, and exploring the outdoors with her sons when she is not at work. Dr. Riegert is rated as an Experienced provider by MediFind in the treatment of Ependymoma. Her top areas of expertise are Pleuropulmonary Blastoma, Lung Cancer, Small Cell Lung Cancer (SCLC), and Angiosarcoma.

Dr. Brian Witwer grew up in Lancaster, Pennsylvania. He received his medical degree from Temple School of Medicine. During his medical training, he spent a year at Harvard University at Massachusetts General Hospital in the Oncology Department. He completed his residency training at the University of Wisconsin, serving as Chief Resident of Neurological Surgery. During his training, Dr. Witwer participated in an in-folding fellowship in minimally invasive spine surgery at the University of Chicago.Dr. Witwer joined St. Mary?s Medical Center in 2006 after practicing in Kentucky, Indiana, and in private practice in Grand Junction. His special interests are treatment of all diseases and injuries to the nervous system, spine and brain. He has a particular interest in minimally invasive spine surgery. He has been instrumental in the building of a functional Neurosurgery Multidisciplinary Team that is unique in its collaborative approach to movement disorders.Dr. Witwer and his wife, Stephanie, are the parents of two children. When he is not practicing neurosurgery, you may find Dr. Witwer skiing, hiking or golfing. Dr. Witwer is rated as an Experienced provider by MediFind in the treatment of Ependymoma. His top areas of expertise are Chronic Subdural Hematoma, Subdural Hematoma, Parkinson's Disease, Deep Brain Stimulation, and Microdiscectomy.

Vernon King is a Radiation Oncologist in Grand Junction, Colorado. Dr. King is rated as an Advanced provider by MediFind in the treatment of Ependymoma. His top areas of expertise are Anaplastic Thyroid Cancer, Thyroid Cancer, Primitive Neuroectodermal Tumor (PNET), and Posterior Fossa Tumor.

Robert Replogle is a Neurosurgery specialist and a Radiologist in Grand Junction, Colorado. Dr. Replogle is rated as an Experienced provider by MediFind in the treatment of Ependymoma. His top areas of expertise are Subdural Hematoma, Chronic Subdural Hematoma, Vein of Galen Aneurysm, Awake Craniotomy, and Bone Graft. Dr. Replogle is currently accepting new patients.

Edward Maurin is a Neurosurgery provider in Grand Junction, Colorado. Dr. Maurin is rated as an Experienced provider by MediFind in the treatment of Ependymoma. His top areas of expertise are Subdural Hematoma, Chronic Subdural Hematoma, Delirium, Microvascular Decompression, and Microdiscectomy. Dr. Maurin is currently accepting new patients.

Randall Oldroyd is a Radiation Oncologist in Grand Junction, Colorado. Dr. Oldroyd has been practicing medicine for over 24 years and is rated as an Experienced provider by MediFind in the treatment of Ependymoma. His top areas of expertise are Breast Cancer, Angiosarcoma, Glioma, and Pleuropulmonary Blastoma. Dr. Oldroyd is currently accepting new patients.