Originally from Sioux Falls, South Dakota, Dr. O'Day earned her medical degree from the University of Minnesota Medical School in the Twin Cities. She completed an internship and residency in internal medicine at Brigham and women's Hospital in Boston, and a fellowship in endocrinology, diabetes and metabolism at the New York University School of Medicine in New York. Dr. O'Day is board certified in internal medicine and endocrinology, diabetes and metabolism.Dr. O'Day has a special interest in diabetes management, cystic fibrosis related diabetes, thyroid disorders, thyroid cancer, pituitary disorders, polycystic ovarian syndrome, osteoporosis and adrenal disorders. Prior to relocating to Denver, Dr. O'Day was working as an endocrinologist in Minnesota, in the Twin Cities area.Dr. O'Day and her family moved from Minneapolis to Denver for the sunshine and the mountains. During her free time she enjoys hiking with her husband and son, and all things Disney. Dr. O'day is rated as an Advanced provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Addison's Disease, Secondary Adrenal Insufficiency, Triple A Syndrome, and Thyroid Cancer.

Dr. Stanciu was born and raised in Bucharest, Romania, where she earned her Doctor of Medicine from Carol Davila University. She continued her medical training with an internship in general surgery and a general medicine residency in Bucharest, Romania. Dr. Stanciu moved to the United States in 1997 to complete an Internal Medicine Residency at Cook County Hospital in Chicago. She then completed an Endocrinology Fellowship at Loyola University in Maywood, Illinois.Dr. Stanciu is board-certified in endocrinology, diabetes, and metabolism, and internal medicine. She has expertise in parathyroid, osteoporosis, and other metabolic bone disorders (including rare bone disorders).Dr. Stanciu believes in engaging patients in learning about their disease and available treatment options to achieve the best possible outcomes. She aims to make patients comfortable with their treatment decisions, knowledgeable about the disease process, and encourage them to actively participate in their healing by promoting a healthy and active lifestyle.�I am thorough in my evaluation so I can understand the root cause of the disease, find the appropriate treatment option, and explain to the patient in easy-to-understand language. I love to see the patient getting back to an active lifestyle.�When she is not working, Dr. Stanciu enjoys the beautiful weather and mountains of Colorado, where she can be found hiking and camping in the summer and skiing in the winter. She has two daughters, one granddaughter, and three grandsons.Dr. Stanciu is a 5280 Magazine Top Doctor for 2020, 2021, 2023, and 2024. Dr. Stanciu is rated as an Advanced provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Osteoporosis, Postmenopausal Osteoporosis, Hyperparathyroidism, and Neonatal Severe Hyperparathyroidism.

Bryan Haugen is an Endocrinologist in Aurora, Colorado. Dr. Haugen is rated as a Distinguished provider by MediFind in the treatment of Medullary Thyroid Carcinoma. His top areas of expertise are Thyroid Cancer, Anaplastic Thyroid Cancer, Follicular Thyroid Cancer, Thyroidectomy, and Hormone Replacement Therapy (HRT).

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

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 Experienced provider by MediFind in the treatment of Medullary Thyroid Carcinoma. His top areas of expertise are Lung Cancer, Pleuropulmonary Blastoma, Squamous Cell Lung Carcinoma, and EGFR Positive Lung Cancer.

Whitney Goldner is an Endocrinologist in Aurora, Colorado. Dr. Goldner is rated as a Distinguished provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Thyroid Cancer, Thyroid Nodule, Anaplastic Thyroid Cancer, Thyroidectomy, and Hormone Replacement Therapy (HRT).

Susan Henley is an Endocrinologist in Colorado Springs, Colorado. Dr. Henley is rated as a Distinguished provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Anaplastic Thyroid Cancer, Thyroid Cancer, Papillary Thyroid Cancer, and Medullary Thyroid Carcinoma. Dr. Henley is currently accepting new patients.

Amanda Lagreca is an Endocrinologist in Aurora, Colorado. Dr. Lagreca is rated as a Distinguished provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Anaplastic Thyroid Cancer, Follicular Thyroid Cancer, Thyroid Cancer, and Medullary Thyroid Carcinoma.

Daniel Bowles is an Oncologist and a Hematologist Oncology provider in Aurora, Colorado. Dr. Bowles is rated as a Distinguished provider by MediFind in the treatment of Medullary Thyroid Carcinoma. His top areas of expertise are Thyroid Cancer, Anaplastic Thyroid Cancer, Adenoid Cystic Carcinoma, Salivary Gland Tumors, and Lymphadenectomy.

Sarah Mayson is an Endocrinologist in Aurora, Colorado. Dr. Mayson is rated as a Distinguished provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Thyroid Cancer, Anaplastic Thyroid Cancer, Follicular Thyroid Cancer, and Medullary Thyroid Carcinoma.

Kimberly Vanderveen is a General Surgeon in Denver, Colorado. Dr. Vanderveen is rated as a Distinguished provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Hyperparathyroidism, Papillary Thyroid Cancer, Medullary Thyroid Carcinoma, Thyroidectomy, and Parathyroidectomy.

Madeleine Kane is a Hematologist Oncology specialist and an Oncologist in Aurora, Colorado. Dr. Kane is rated as an Advanced provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Thyroid Cancer, Neuroendocrine Tumor, Follicular Thyroid Cancer, and Anaplastic Thyroid Cancer. Dr. Kane is currently accepting new patients.

Meriam Izon is an Endocrinologist in Fort Collins, Colorado. Dr. Izon is rated as an Advanced provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Obesity in Children, Type 1 Diabetes (T1D), Hypothyroidism, and Diabetic Nephropathy.

Linda Buckley is an Endocrinologist in Englewood, Colorado. Dr. Buckley is rated as an Advanced provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Type 1 Diabetes (T1D), Obesity in Children, Hypothyroidism, and Hashimoto Thyroiditis.

Lori Gerard is an Endocrinologist in Englewood, Colorado. Dr. Gerard is rated as an Advanced provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Type 1 Diabetes (T1D), Obesity in Children, Hypothyroidism, and Hashimoto Thyroiditis.

Nikita Pozdeyev is an Endocrinologist in Aurora, Colorado. Dr. Pozdeyev is rated as an Advanced provider by MediFind in the treatment of Medullary Thyroid Carcinoma. His top areas of expertise are Thyroid Cancer, Anaplastic Thyroid Cancer, Follicular Thyroid Cancer, Thyroidectomy, and Splenectomy.

Julie Newburg is an Otolaryngologist in Pueblo, Colorado. Dr. Newburg is rated as an Advanced provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Anaplastic Thyroid Cancer, Papillary Thyroid Cancer, Follicular Thyroid Cancer, and Medullary Thyroid Carcinoma.

Daniel Shonebarger is a Hematologist Oncology specialist and a Hematologist in Colorado Springs, Colorado. Dr. Shonebarger has been practicing medicine for over 9 years and is rated as an Advanced provider by MediFind in the treatment of Medullary Thyroid Carcinoma. His top areas of expertise are Thyroid Cancer, Papillary Thyroid Cancer, Follicular Thyroid Cancer, and Medullary Thyroid Carcinoma. Dr. Shonebarger is currently accepting new patients.

Virginia Sarapura is an Endocrinologist in Aurora, Colorado. Dr. Sarapura is rated as an Advanced provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Anaplastic Thyroid Cancer, Follicular Thyroid Cancer, Medullary Thyroid Carcinoma, and Thyroid Cancer.

Kelsi Lacock is an Endocrinologist in Englewood, Colorado. Dr. Lacock is rated as an Advanced provider by MediFind in the treatment of Medullary Thyroid Carcinoma. Her top areas of expertise are Obesity in Children, Hypothyroidism, Type 1 Diabetes (T1D), and Thyroid Storm.