Dr. Kemmis was born and raised in South Dakota. He earned a bachelor�s degree from the University of South Dakota and then continued his education at the University of South Dakota Sanford School of Medicine, where he received his medical degree. From a young age, Dr. Kemmis took interest in the practice of medicine. He found his passion in Radiation Oncology and loves the opportunity to care for cancer patients by offering advanced and rapidly progressive treatments.�Dr. Kemmis� philosophy of care is, �I enjoy engaging patient in all treatment options available for their specific disease. �I am here to educate and assist patients in making the best decision for their specific needs.� He would like for his patients to know that his goal is to help educate first and foremost, even if treatment is not chosen.Dr. Kemmis�is an investigator involved in clinical research trials in the areas of breast surgery. His research includes surgical treatment of the breast.�When he is not at work, Dr. Kemmis enjoys outdoor activities with his family.Dr. Kemmis is excited to provide treatment options for all types of cancer at Lutheran Medical Center. Dr. Kemmis is rated as an Experienced provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Breast Cancer, Pleuropulmonary Blastoma, Metastatic Brain Tumor, and Lung Cancer.

John Sampson is a Neurosurgery provider in Aurora, Colorado. Dr. Sampson is rated as an Experienced provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Glioma, Gliomatosis Cerebri, Astrocytoma, Glioblastoma, and Awake Craniotomy. Dr. Sampson is currently accepting new patients.

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 Gliosarcoma. Her top areas of expertise are Pleuropulmonary Blastoma, Lung Cancer, Small Cell Lung Cancer (SCLC), and Angiosarcoma.

Mark Robinson is a Neurosurgery provider in Golden, Colorado. Dr. Robinson is rated as an Experienced provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Spinal Stenosis, Cervical Spondylosis, Subdural Hematoma, Microdiscectomy, and Cervical Disc Surgery.

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 Gliosarcoma. His top areas of expertise are Chronic Subdural Hematoma, Subdural Hematoma, Parkinson's Disease, Deep Brain Stimulation, and Microdiscectomy.

David Vansickle is a Neurosurgery provider in Lone Tree, Colorado. Dr. Vansickle is rated as an Experienced provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Parkinson's Disease, Essential Tremor, Movement Disorders, Deep Brain Stimulation, and Microdiscectomy.

Dr. Weintraub is originally from Canton, Connecticut. She earned a bachelor�s degree from Harvard University and continued her education at the University of Colorado School of Medicine, where she received her medical degree.Following her education, she completed her residency in Radiation Oncology at the University of Colorado Health. From an early age, Dr. Weintraub knew that she wanted a career that would allow her to help others in need. Being able to provide patients with the most advanced treatments, by utilizing cutting-edge radiology techniques, is one of her favorite aspects of working in radiation oncology.Dr. Weintraub is an investigator involved in clinical research trials in the area of radiation oncology. Her research focus includes the treatment of various cancers with radiation. Dr. Weintraub�s philosophy of care is, �My goal is to support each patient by using evidence-based medicine and each patient�s own goals to arrive at a patient-centered treatment plan.� She cares deeply about each of her patients and loves that her career allows her to provide support and guidance during their challenging health journeys. In her free time, Dr. Weintraub enjoys spending time with her family and reading. She also enjoys spending time in nature and trail running. Dr. Weintraub is rated as an Experienced provider by MediFind in the treatment of Gliosarcoma. Her top areas of expertise are Breast Cancer, Intraductal Papilloma, Familial Pancreatic Cancer, and Primitive Neuroectodermal Tumor (PNET).

Born in Kansas City, Missouri, Dr. Owsley earned his medical degree in Kansas City. He moved to Denver and completed his residency at Saint Joseph Hospital. After his residency, he worked as a hospitalist in Denver prior to starting a fellowship at the University of Tennessee in Memphis. His clinical interests surround melanoma, lymphoma and primary brain cancers.�A cancer diagnosis is an ailment that encompasses the entire person and as an oncologist, I am privileged to be a part of my patient�s journey. We would not just focus on the disease itself, but also on the effect it has on other aspects of the patient�s life. Overriding everything, we must never lose hope.�Dr. Owsley makes it a priority to be with his patients every step of the way during their cancer journey. He will fight alongside them and is readily available to assist in each patient�s unique journey.Dr. Owsley is an investigator involved in clinical research trials in the area of hematology and medical oncology.�When not at work, Dr. Owsley spends his time watching his daughter grow up. He enjoys watching sports and rooting for his favorite teams including the Kansas City Chiefs. However, his wife is a native Denverite and makes sure to balance out his love of the Chiefs with her love of the Broncos. He loves taking advantage of the amazing opportunities that the 300 days of Colorado sunshine provide. Dr. Owsley is rated as an Experienced provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Paget Disease of the Breast, Breast Cancer, Lynch Syndrome, and Squamous Cell Lung Carcinoma.

Kevin Chow is a Neurosurgery provider in Lafayette, Colorado. Dr. Chow has been practicing medicine for over 12 years and is rated as an Experienced provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Meningioma, Subdural Hematoma, Pituitary Tumor, Spinal Cord Abscess, and Awake Craniotomy. Dr. Chow is currently accepting new patients.

Denise Damek is a Neurologist in Aurora, Colorado. Dr. Damek is rated as a Distinguished provider by MediFind in the treatment of Gliosarcoma. Her top areas of expertise are Glioblastoma, Astrocytoma, Glioma, and Brain Tumor.

Douglas Ney is a Neurologist in Aurora, Colorado. Dr. Ney is rated as a Distinguished provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Astrocytoma, Glioblastoma, Glioma, and Brain Tumor. Dr. Ney is currently accepting new patients.

David Ormond is a Neurosurgery provider in Aurora, Colorado. Dr. Ormond is rated as a Distinguished provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Glioblastoma, Astrocytoma, Brain Tumor, Awake Craniotomy, and Gastrostomy. Dr. Ormond is currently accepting new patients.

Kevin Lillehei is a Neurosurgery provider in Aurora, Colorado. Dr. Lillehei is rated as a Distinguished provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Pituitary Tumor, Hypothalamic Tumor, Brain Tumor, Awake Craniotomy, and Gamma Knife Radiosurgery.

Sameer Nath is a Radiation Oncologist in Aurora, Colorado. Dr. Nath is rated as a Distinguished provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Prostate Cancer, Brain Tumor, Familial Prostate Cancer, and Small Cell Lung Cancer (SCLC). Dr. Nath is currently accepting new patients.

James Moore is an Oncologist and a Hematologist in Fort Collins, Colorado. Dr. Moore is rated as a Distinguished provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Mantle Cell Lymphoma (MCL), Chromophobe Renal Cell Carcinoma, WT1-Related Wilms Tumor Syndromes, and Familial Wilms Tumor 2. Dr. Moore is currently accepting new patients.

Arthur Liu is a Radiation Oncologist in Fort Collins, Colorado. Dr. Liu is rated as a Distinguished provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Posterior Fossa Tumor, Ependymoma, Atypical Teratoid Rhabdoid Tumor (ATRT), Melanoma, and Tissue Biopsy. Dr. Liu is currently accepting new patients.

Nauman Moazzam is a Hematologist Oncology specialist and a Hematologist in Lakewood, Colorado. Dr. Moazzam is rated as a Distinguished provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Familial Colorectal Cancer, Colorectal Cancer, Chronic Familial Neutropenia, and Agranulocytosis.

Timothy Waxweiler is a Radiation Oncologist in Aurora, Colorado. Dr. Waxweiler is rated as an Advanced provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Lung Cancer, Posterior Fossa Tumor, Thymic Epithelial Tumor, and Anal Cancer. Dr. Waxweiler is currently accepting new patients.

Joshua Petit is a Radiation Oncologist in Fort Collins, Colorado. Dr. Petit is rated as an Advanced provider by MediFind in the treatment of Gliosarcoma. His top areas of expertise are Throat Cancer, Familial Prostate Cancer, Prostate Cancer, Posterior Fossa Tumor, and Vertebroplasty. Dr. Petit is currently accepting new patients.

Mackenzie Daly is a Radiation Oncologist in Aurora, Colorado. Dr. Daly is rated as an Advanced provider by MediFind in the treatment of Gliosarcoma. Her top areas of expertise are Astrocytoma, Oligodendroglioma, Breast Cancer, and Gliosarcoma. Dr. Daly is currently accepting new patients.