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 the founder and CEO of Nextera Healthcare and North Vista Medical Center. Nextera Healthcare is Colorado’s first Direct Primary Care (DPC) program, established in 2009. Nextera Healthcare members are assessed an affordable monthly membership fee for unlimited office visits and virtual consultations with physicians at North Vista Medical Center and affiliate medical practices. Nextera Healthcare was selected by FierceHealthcare out of hundreds of healthcare companies across the world as one of the 2019 Fierce 15 companies and has been designated as one of the most promising healthcare companies in the industry. Nextera Healthcare has established a community of over 100 clinics throughout Colorado, Maryland, Michigan, Nebraska, Iowa, Florida, Virginia, Wyoming, and the Washington DC area. North Vista Medical Center, voted Best Business by the Longmont Times-Call Reader’s Choice Awards, is a primary care hybrid practice with 6 locations in northern Colorado.

Board-certified in Family Medicine, a diplomat of the American Board of Family Medicine and an actively practicing physician, Dr. Flanagan has been a fixture in Colorado healthcare for over 20 years, was named to the Top 20 Who’s Who in Direct Primary Care in the US, and was invited in 2019 to be a founding committee member of the Direct Primary Care Mastermind Initiative focusing on serving employers.

Dr. Flanagan graduated from the University of Nebraska Medical Center and completed his residency at St. Mary’s Family Medicine Program in Grand Junction, CO. In addition to working as a Family Medicine physician, he has fifteen years of experience as an emergency physician working in many underserved communities throughout Colorado and as far away as Iraq where he served as an officer in the Army Medical Corps.

An accomplished healthcare visionary, Dr. Flanagan regularly contributes to policy discussions at the state and federal level to ensure physicians and healthcare providers have ample opportunity to deliver high quality, affordable and accessible care to families and businesses. He has testified on behalf of DPC and has been directly involved in DPC legislation that passed unanimously in Colorado and Nebraska. He sits on the Steering Committee of the National Direct Primary Care Coalition and during their June 2014 Washington DC conference, he was invited to discuss DPC at the White House. He has also been invited to present his insights on the emergence and implementation of DPC to a wide range of groups, including medical students, residents, and professional associations. His free time is spent enjoying his family and outdoor fitness pursuits in the Colorado Rockies.

Dr Flanagan’s practice is currently full and is not accepting new insurance or cash pay patients.

Read Dr. Flanagan’s patient reviews here

Natasha Deming, MD, Dr. Deming is a Board-Certified Family Medicine Physician who is excited to join the Nextera team! She received her Undergraduate and Medical degrees at the University of Florida. She then became a Colorado transplant to complete her residency at Rose Family Medicine Residency in Denver in 2016.

Dr. Deming has always loved the “cradle to grave” scope of Family Medicine with the ability to care for people of all ages. She has been passionate about serving her patients in a collaborative and compassionate manner. After her residency training, she served in the rural farming community of Yuma, Colorado for six years. She provided primary care, inpatient and emergency medicine to the community. This opportunity challenged Dr. Deming to serve her patients in creative ways to provide them the care that they needed with limited resources to specialty care and other support. She gained a great deal of knowledge about medicine and herself as this experience shaped her practice as a physician.

Her clinical practice focuses on broad-spectrum Family Medicine including preventative medicine, care of chronic conditions, weight loss management, pediatrics, women’s health, and urgent care needs. She especially enjoys the opportunity to form open and trusting relationships with her patients and finds this to be the most gratifying aspect of practicing medicine. She performs a variety of procedures including long-term birth control insertion and removal, fracture splinting/casting, joint injections, minor skin procedures, and others.

In her spare time, you can find her playing with plants, paint and yarn; cooking, fishing, traveling, reading, practicing martial arts, and spending time in the beautiful Colorado outdoors.

Jacqueline Harrison, MD, grew up on a farm in northeast Nebraska. She completed undergraduate school at the University of Nebraska-Kearney with a degree in Biology. In 2014, she earned her medical degree from the University of Nebraska Medical Center in Omaha, NE. She then completed her residency training in family medicine at the University of Michigan. She has been board-certified in family medicine since 2017. She enjoys seeing people of all ages and likes to take the time to get to know her patients. Building a relationship between provider and patient is one of the many perks of being a family medicine physician. Her clinical interests include preventative care, chronic disease management, and women’s health.

In her free time, Dr. Harrison enjoys spending time with her husband and two young children. She loves any and all activities that get her out in the fresh air. She also enjoys cooking/baking, horseback riding, and traveling.

Sarah Gaven, FNP-C, is a board-certified Family Nurse Practitioner through the American Academy of Nurse Practitioners (AANP). She received a bachelors in Ecology and Evolutionary Biology from the University of Colorado, Boulder followed by a Bachelor of Science in Nursing from the Denver College of Nursing. She graduated with honors from the University of Colorado, Anschutz Medical Campus with her Master of Science in Nursing degree. Sarah’s passion for medicine lies in the relationships that she builds with her patients. She believes in holistic care, marrying medicine with lifestyle management and loves to work collaboratively with her patients to find their best course of treatment. Sarah’s background is in internal medicine; she appreciates clinic medicine for the opportunity to form lasting connections. She enjoys helping her patients maintain optimal health and watching them improve over time. When not at work, Sarah loves spending time with her family. She is fond of traveling and being outdoors, including hiking and paddle boarding. After growing up in Florida, Sarah enjoys spending time around water in any way she can. When she’s not adventuring with her family, Sarah spends her time reading and creating art

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.

Read Dr. Walker’s patient reviews here

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.