We offer a full spectrum of primary care services.

These services include: adult and pediatric care, complete preventative and urgent medical care, chronic disease management, customized bio-identical hormone therapy, painless allergy testing and treatment, weight loss and nutrition, depression, anxiety, and insomnia.

Our Board Certified physicians also bring over 10 years of emergency room experience to meet your urgent medical care needs. From broken bones to sutures, the doctors at North Vista Medical Center can manage most non-life threatening injuries and illnesses in their office.

North Vista Medical Center has offices located in Longmont, Frederick, Fort Collins, Greeley, and Boulder, Colorado to better accommodate our many patients in Firestone, Dacono, Erie, Niwot, Mead, Gunbarrel and surrounding communities on the front range. Our hours are Monday through Friday, 8:00am to 5:00pm. Please call for available appointment times.

Put it all together and you have a health care experience that is centered on you, built to suit your needs both as a patient and as a person.

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Clint Flanagan, MD, is Board Certified in Family Medicine, a member of the American Academy of Anti-Aging Medicine and the American Society for Laser Medicine and Surgery. Dr. Flanagan has nearly 10 years experience as an ER physician and maintains certificates in Advanced Cardiac and Advanced Trauma Life Support. He completed medical school at the University of Nebraska Medical Center then went on to residency at St Mary’s Family Medicine Program in Grand Junction, Colorado. He’s a diplomate of the American Academy of Family Physicians.

Dr. Flanagan is eager to share his knowledge with patients to help them improve their quality of life. “I appreciate the courage it takes for patients to speak with me about aspects of their health they would like to improve. I strive to facilitate open, reliable communication where patients feel relaxed and at ease in an environment conducive to extreme trust and comfort.”

Dr. Flanagan will help you identify functional imbalances in your physical, hormonal, mental, and nutritional systems, and put the pieces together for you. “I’m passionate about pro-active, preventative medical care and feel it’s my responsibility to guide patients in the right direction. It’s important my patients view me as sincere and trustworthy. Too often our healthcare system practices reactive medicine. I’m a firm believer in optimizing nutrition and exercise rather than focusing on prescriptions as an automatic solution. While medicine has its role at times, too often non-prescription plans aren’t addressed. I want patients to achieve their optimal health and well-being, as naturally as possible.”

Dr. Flanagan enjoys the Colorado lifestyle with his wife and three young, very active children.

Dr Flanagan’s practice is currently full and is not accepting new insurance or cash pay patients. He is still accepting new Nextera Healthcare members.

Read Dr. Flanagan’s patient reviews here

Joy Magruder, MD, graduated from Jefferson Medical College in Philadelphia, PA in 1997. While at Jefferson Medical College, she participated in their Physician Shortage Area Program with a focus on training doctors to practice rural medicine. She then completed her Family Medicine Residency training in Duluth, MN in 2000, when she was also board certified in Family Medicine. She spent five years in rural Proctor, MN practicing full-spectrum Family Medicine including Obstetrics. In 2005, she moved with her family to Riverton, WY and practiced rural medicine for 9 years and then neighboring town of Thermopolis, WY for 3 years. In 2016, her husband’s job brought her and her family to sunny Colorado where she continued to practice Family Medicine in the Loveland community.

Tim Nagel, MD, brings nearly three decades of family medicine experience to North Vista Medical Center. Prior to joining the North Vista Medical Center team, Dr. Nagel practiced medicine in rural Iowa, caring for patients of all ages. There, he delivered hundreds of babies and cared for them from birth into adulthood. For his older patients, Dr. Nagel’s experience in geriatric medicine has enabled him to help countless patients successfully manage a wide range of chronic age-related diseases while also helping patients and their families understand and navigate end of life issues.

A proponent of preventive care, Dr. Nagel promotes an active, healthy lifestyle for all of his patients. In addition to routine family medicine services, he assists in creating nutrition and exercise plans tailored to the individual needs of his patients.

Dr. Nagel is board-certified in family medicine and is a member of the American Academy of Family Physicians. He earned his medical degree and completed his family practice residency training at the University of Iowa. Dr. Nagel, who spent years assisting in the emergency department of his local hospital, holds numerous life support certifications, including advanced cardiac life support (ACLS), advanced trauma life support (ATLS), basic life support (BLS) and pediatric advanced life support (PALS). Throughout his medical career, Dr. Nagel has served as a preceptor at the University of Iowa, helping to train the next generation of physicians and physician assistants.

Dr. Nagel and his wife, Denise, have nine children and seven grandchildren. Having vacationed in Colorado for more 25 years, he is excited to begin practicing medicine and serving patients in the Centennial State.

Read Dr. Nagel’s patient reviews here

Sandra McCowen, MD, started her health care career as a Registered Nurse. She graduated with her medical degree from Michigan State University College of Human Medicine in 1999 and from Marquette Family Medicine Residency Program in 2002. During her experience as a nurse and through her medical training she became interested in lifestyle and diet as a pathway to healthy function and prevention of chronic disease.

Dr. McCowen is board certified in Family Medicine. She was also certified for Integrative Medicine in 2010 by ABIHM.

Over the past 5 years she has been working in an Integrative Medicine clinic and has developed expertise in hormone treatment for men and women. While one focus will be her hormone practice, she is excited to use her full knowledge and experience in a primary care setting.

Joseph Turner, MD, is Board Certified in Internal Medicine and has more than twelve years of experience as an internist, treating all manner of adult illness. He completed medical school at the University of Missouri and then went on to internship and residency at the University of North Carolina-Chapel Hill. He is a member of both the American Board of Internal Medicine and the American College of Physicians.

He has a special interest in acute medical illness — especially heart failure and infectious diseases. He also has special interests in medical education, having instructed medical residents and nurse practitioner students at his most recent affiliated hospital, St. Anthony’s Hospital, as well as medical ethics and health systems improvements, having served as the co-chairman of the medical ethics committee at North Suburban Medical Center.

He and his wife, along with their two sons, enjoy Colorado weather and outdoor activities such as hiking, snowshoeing, and hockey. Dr. Turner can also be found listening to music of all types, pretending he is still a radio DJ!

Katherine Walker, MD, is a Board Certified Family Medicine Physician with over 20 years of clinical experience. She is also an active member of American Academy of Family Physicians. Dr. Walker graduated from the University of Louisville School of Medicine (Louisville, Kentucky is her hometown). And, she attended Northwestern University as an undergraduate with a major in Latin American studies. She is fluent in Spanish. Dr. Walker enjoys treating patients of all ages with a variety of conditions. Special areas of interest are the treatment of anxiety and depression. Dr. Walker strives to provide compassionate, personalized care. She has been told by her patients that they really feel that she listens to their concerns and provides valuable feedback. Many of her patients have said that she has an “excellent bedside manner.” For specific patient reviews, please Google “Dr. Katherine Walker Health Grades.” Dr. Walker has practiced in the Longmont area since 2003. She truly appreciates and values developing long-standing patient relationships. Caring for the whole family, and helping patients to achieve mutual health care goals is a priority for her.

Dr. Walker also teaches at the St. Anthony North Family Medicine Residency. There she supervises physicians in training. This rewarding work requires her to stay current with the latest evidence-based medicine recommendations.

In her spare time, Dr. Walker enjoys spending time with her husband and two dogs. She is an avid skier and stays active with cycling and running. Another passion of hers is leading medical mission trips to underserved areas abroad. She has been to Central and South America numerous times.

Carrie Wilcox, MD, is board certified in family medicine. A native Nebraskan, she attended medical school at the University of Nebraska Medical Center before moving to Denver to complete her training with Rose Family Medicine Residency. She returned to Colorado in 2013 after spending a year practicing medicine in New Zealand.

Dr. Wilcox joined North Vista Medical Center in fall 2013 to be part of a practice that matches her passions for emphasizing preventive medicine and building strong relationships with the community. She specializes in full-spectrum family medicine, with a particular interest in caring for multi-generational families, minor office procedures, sports medicine, and pediatrics.

In her free time, Dr. Wilcox likes to hike, spend time with friends, explore new cuisine, and is always looking for her next travel adventure.

Read Dr. Wilcox’s patient reviews here