About Us

Meet Our Team

Our Motto

 Innovation | Integration | Optimization


Our Mission

Restoring Health Worldwide


Our Core Values

To restore the body through evidence based treatments and reverse the impact of disease and degeneration.
Our attitude, behavior and decisions are guided by our Core Values and faith based morals.


Virtuous: We check our egos at the door, we are humble and loyal to each other as we listen and create a unified synergy with patients and our team.
Brilliant: We are unique pioneers. We are growth minded and strive for excellence.
Results: We are here to change healthcare by restoring health and vitality in our patients.

Patients Treated

Regenerative Treatments


Our team

Our Team

Non-Surgical Orthopedics


Joel Baumgartner, MD & CAQ Sports Medicine

Board Certified in Family Medicine & Non-Surgical Orthopedics & Sports Medicine

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Dr. Joel Baumgartner is a board certified physician with a specialized fellowship in non-surgical orthopedics and sports medicine. He earned his medical degree from the University of North Dakota School of Medicine, and completed his family practice residency at the University of North Dakota. Dr. Baumgartner completed his advanced training in sports medicine with a fellowship in primary care sports medicine at Hennepin County Medical Center. He utilizes the latest in diagnostic and treatment technology to better treat musculoskeletal injury and pain. As an international speaker, he instructs both physicians and those in the medical industry on pain evaluation, diagnosis and the latest treatment options. Dr. Baumgartner has authored a book on Prolotherapy and PRP technique, He is also a contributing author on the subject of pain management for a variety of other popular publications. His family and faith remain his priority.


Terrence Keller, PA-C

Certified Physician Assistant

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Optimizing patient health and functionality through an integrated approach is what really drew Terrence to Rejuv Medical. Originally from North Dakota, Terrence completed Bachelor’s degrees in Athletic Training and Exercise Science at Minnesota State University Moorhead. While working for 7 years as an athletic trainer and sports specialist, he pursued a Master’s degree in Physician Assistant Studies at Augsburg College in Minneapolis.

He worked the past 5+ years in an acute care setting in Fergus Falls, MN. While enjoying seeing patients in this capacity, he knew there was something missing. With the orthopedic background, he has always kept this field in the back of his mind. “I cannot believe how lucky I was to find an organization at the cutting edge of technology while improving healthcare from its source, the patient.” He is looking forward to working with patients to Rejuvenate their health.

Terrence loves spending time with his family. He is married with two children and several pets. They enjoy living life spontaneously to take in all the beauty this world has to offer. He is also a functional fitness enthusiast, learning the capabilities of his body while optimizing his nutrition and workload.

Heidi Robertson, MD

Regenerative Medicine Specialist & Anesthesiologist Specialist

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Doctor Heidi Robertson’s love for helping started in high school after participating in a mission trip. Dr. Robertson began her medical training in southern California where she graduated with her medical degree at Loma Linda Medical University in 2002. She trained at the renowned Loma Linda Medical Center for Anesthesiology, graduating in 2007 and was board certified in 2008. In 2012 Dr. Robertson began to feel a pull toward regenerative medicine. She realized the hope that could bring many patients by using prolotherapy. Doctor Robertson has always believed that bringing hope and healing to patients, is one of the greatest privileges she can have in this life. Watching patients with chronic pain even after many surgeries prompted her to research the possibilities of reversing or curing such pain. She completed the extensive Hackett-Hemwall training for prolotherapy in Honduras in 2013 and again in 2014. She also completed the American Academy of Orthopedic Medicine prolotherapy workshop in Peru in 2014. Not only does Dr. Robertson have the training and expertise to treat your pain, she has superb bedside manor and a genuine love for medicine. Dr Robertson’s skills include pain management, spinal and epidural blocks, peripheral nerve blocks, and prolotherapy.


Michelle Dahlberg, PA-C

Certified Physician Assistant

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Michelle is very excited to join the Rejuv family in making innovative strides in healthcare. She has always been interested in sports medicine, as she was an Athletic Trainer for 10 years before becoming a Physician Assistant in 1999. Having earned her Bachelor of Science in Athletic Training and Psychology at South Dakota State University, she then earned a MA degree in Injury Aspects of Sports Psychology (Kinesiology) at the University of Minnesota, where she also worked for the Gopher Women’s Athletic Department. After working in Athletic Training at Slippery Rock University for 2 years in Pennsylvania, she then attended Augsburg College where she earned her Physician Assistant Certification. For the past 20 years she has lived in Little Falls, rounding out her medical experiences in both surgical orthopedics and in family practice as a Board Certified Physician Assistant. She is now excited to help her Rejuv patients manage their total healthcare needs in ways that fits their personal wellness goals.
Michelle is an avid recreational and fitness fan. She has run many triathlons and half marathons, but finds outdoor recreation her true passion. She loves to travel in search of find new locations to bike, hike, kayak, canoe or ski with her friends and family.

Her most important and loved job, however, is being an mom and wife. Together with her husband Doug, they carefully monitor their ever-changing calendar, provide taxi services and are a constant presence in the stands for their four kids sports, music and church activities.


Matthew J. Janzen, MD

Physical Medicine and Rehabilitation Physician

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Dr. Matthew Janzen is a Physical Medicine and Rehabilitation physician specializing in pain management. Dr. Janzen began his medical journey at the University of Minnesota where he obtained his Bachelor’s of Science in Genetics and Neuroscience before he attended the University of Minnesota Medical School where he received his MD. He spent his Intern year after medical school training at Broadlawns Medical Center in Des Moines, Iowa. After his Intern year, he spent the next 3 years completing his Physical Medicine and Rehabilitation residency at Tufts Medical Center in Boston, Massachusetts. Following residency, he completed an Interventional Pain Management fellowship at Deuk Spine Institute in Melbourne, Florida. Dr. Janzen’s skills include: pain management, peripheral nerve blocks, joint injections, and all types of therapeutic and diagnostic spinal injections. He believes in taking a patient centered, multidisciplinary approach to optimize patients’ health and quality of life. Dr. Janzen is a Minnesota native whose family and friends are what drew him back from the east coast. Dr. Janzen loves all water sports in the summertime, alpine skiing in the winter, and traveling to new places in between. 

Primary Care & Functional Medicine 


James Baumgartner, MD

Board Certified in Internal Medicine

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Dr. Baumgartner is a board certified Internal Medicine doctor with over 30 years of experience and 10 of those years in the St. Cloud area at the former Allina Medical Clinic. If you’re looking for a new Primary Care physician or have Urgent Care needs or suffering from issues with sleep, headaches, obesity/weight management, skin irritations, mental health, wellness, disease prevention/management, or other ailments, Dr. James Baumgartner is here to help. He takes a personalized care approach that is essential for best outcomes. Dr. Baumgartner will also be working with our talented and passionate Nurse Practitioners, Health Coaches and Medical Fitness Specialists at restoring your health.


Valerie Carlson, RN, CNP

Certified Functional Medicine Provider

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Valerie Carlson is a certified nurse practitioner who is interested in improving quality of life for her patients’ through functional medicine. Valerie has over two decades of nursing experience, and obtained her Bachelor and Master’s degrees of science in nursing at Mankato State University. Valerie has been an active member in her community leading groups such as Campfire Boys and Girls, reading groups for elementary school students, chaperoning youth mission trips to Maine and Arkansas. She also chaperoned youth trips to Long Lake Conservation Center and Wolf Ridge Conservation Center. She participated in the M.S. tram Minnesota, biking 300 miles in 5 days. Valerie Carlson’s background includes geriatric nursing, telemetry and ICU RN experience. She spent close to a decade as a nurse practitioner in cardiology, specializing in cholesterol, and primary and secondary cardiovascular prevention. She brings this previous knowledge and experience to Rejuv medical to enrich her functional medicine practice. At Rejuv Valerie Carlson sees patients for hormonal balancing, fatigue, and those who would like to improve their health with weight loss. Valerie sees patients who struggle primarily with:
• Chronic stress and stress-related health problems
• Fatigue or Lack of Energy
• Muscle and Joint Pain or Weakness
• Blood Sugar Dysregulation
• Osteopenia or Osteoporosis
• Insomnia, sleep disturbances or difficulty waking
• Poor memory or difficulty retaining information
• Irritability or Mood Swings
• Hypertension
• Increased waist-to-hip ratio or abdominal obesity
• Anxiety or depression
• Menstrual Disorders
• Postmenopausal Symptoms

In addition to hormone and adrenal function, she also assists patients with Weight loss Physicals or Prescreening.

Paige D

Paige Deters, PA-C

Certified Physician Assistant

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Paige received her Physician Assistant Certification through Bethel University, MN. What brought her interest to Functional Medicine is the patient-centered care that integrates physical, spiritual, mental, and emotional health while incorporating the importance of lifestyle. She enjoys working with individuals of all ages, helping them reach their goals by providing the necessary care, education and resources. She grew up in the Swanville and Little Falls area and now lives in Rice with her husband, Andrew. She has been a competitive athlete through college and is active in softball, basketball, and outdoor activities. With her family and friends, she enjoys hunting, cross country skiing, and traveling to explore, backpack, and volunteer through mission work. Other hobbies include wood working, camping, strength and resistance training, and cooking.


Melissa Mangan, APRN, CNP

Advanced Practice Registered Nurse

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Melissa is a Minnesota-native nurse practitioner specializing in functional medicine. She grew up in Little Falls, MN, where she discovered a passion for competitive endurance sports and health. Melissa pursued her nursing degree from the College of St. Scholastica in Duluth, MN, where she competed in collegiate cross country running, XC skiing, and track. She worked in the pediatric intensive care unit at Children’s Minnesota and pediatric/adult perianesthesia at M Health Masonic Children’s Hospital prior to obtaining her Master of Nursing at Concordia University Wisconsin.

Melissa’s passion lies in treating the cause rather than the effect of disease to optimize a patient’s hormonal and metabolic states. She examines each patient’s unique genetic influences and environmental factors when incorporating diet, lifestyle, and psychosocial health into her practice. Her goal is to help patients find the root cause of their medical concerns rather than using suppressive treatments to mask symptoms. Melissa believes that treating the whole person, identifying underlying issues that influence healing, and promoting a healthy lifestyle are imperative to restore the body and reverse disease.

Melissa loves Minnesota for its seasons and enjoy cross country skiing, biking, and running, especially racing the marathon distance. Together with her husband, they love traveling to new sites for hiking, racing, and exploring. They have an energetic dog who enjoys the same hobbies they do. They enjoy the north shore for its access to outdoor recreation.

Particular areas of interest: cardiometabolic dysfunction, thyroid disorders, autoimmune disease, small intestinal bacterial overgrowth, and hormonal imbalances.

Symptoms: fatigue, bloating, headaches, brain fog, joint pain, constipation, diarrhea, body aches, sleep issues, weight gain or weight loss, worsening of chronic conditions.

Physical Therapy 


Brittney Braegelmann, PT, DPT, SCS

Board Certified Sports Physical Therapist & Department Director

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Brittney received her undergraduate degree from the College of St. Benedict, majoring in Psychology with a Sports Medicine minor. She earned her Doctor of Physical Therapy degree from St. Catherine University. She worked in Duluth, MN after graduation at Essential Health-West Duluth Clinic. After moving to the Twin Cities, she graduated from the Fairview Sports Physical Therapy Residency Program and upon graduation, she treated patients at University Orthopedics Therapy Center in Minneapolis, where she specialized in the Throwing and Next Step Programs. She obtained her Physical Therapy Sports Clinical Specialist Certification in 2013. She has worked at Rejuv Medical in Waite Park, MN since moving back to the St. Cloud area.

Shelby Koll

Shelby Koll, PT, DPT

Physical Therapist

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Shelby received her undergraduate degree from the University of Wisconsin – La Crosse, majoring in Exercise and Sports Science; she then earned her Doctor of Physical Therapy degree from the University of Jamestown. Following her graduation, she worked in Paynesville, MN at the CentraCare-Paynesville Clinic. She has a diverse experience with outpatient adults and pediatrics, athletes, hospital, and nursing home patient populations. She is passionate about the profession of Physical Therapy and wishes to continue to deliver individualized patient-centered care.


Angie Joki, PTA

Physical Therapist Assistant

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Angie is a Licensed Physical Therapist Assistant and received her Physical Therapist Assistant degree from Anoka-Ramsey Community College in 2014. She has been working at Rejuv Medical ever since.  Angie is trained in all types of patients but has a special interest in dancers, swimmers and pediatrics, due to the fact that she was a dancer and swimmer all throughout life. She has also been trained in kinesio-taping which she utilizes with many patients. Angie loves the connections that she gets to make with patients everyday and watching them better themselves.

Outside of Rejuv, Angie is a wife, mom of 3 and a dog mom. She also has been a dance teacher/coach for the last 14+ years. She enjoys spending time with her family, being outside or at the beach and making people laugh


Nick Wittrock, PTA

Physical Therapist Assistant

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Nick graduated from St. Cloud State University with a Bachelor of Science in Recreation and Sports Management. During that time, Nick was a student assistant coach with the women’s basketball team at SCSU. Upon graduation, Nick worked with local high schools and community education programs in coaching and coordinating events in Minnesota.

Nick returned to school and completed the St. Catherine University’s Physical Therapist Assistant Associate’s Degree in Minneapolis/St. Paul. Following this, Nick worked at an outpatient clinic in Sartell before accepting a job offer with Rejuv Medical and has been here since 2019.

You can often find Nick and his wife, Laura, within the community, spending time with family and friends. Nick is passionate about basketball, bowling, hunting, and bettering his patients in an integrated healthcare approach. In the future, he hopes to continue his education and complete his Doctor of Physical Therapy to be a better advocate for his current and future patients.


Maggie Bentley, PTA

Physical Therapist Assistant

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Maggie is orginally from Nebraska where she graduated from Nebraska Methodist College and received her Physical Therapist Assistant degree. She moved to Minnesota shortly after graduating and came to Rejuv! She was very active growing up but had multiple injuries herself, leading her to Physical Therapy. She has a deep passion for physical therapy and helping people reach their goals daily! 


Outside of Rejuv, Maggie is traveling often around the country Drag Racing with her family and boyfriend, Jordan. She loves to make trips back to Nebraska when she can to spend time with her family as well. She likes to stay active and looks forward to exploring Minnesota more!

Rejuv Fitness


Daina O'Brien

Group Fitness Manager

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Daina has 20+ years of experience in the wellness industry along with a background in Advertising. 

After receiving her Personal Training and ACE Group Exercise credentials, Daina found passion in coaching classes small and large for well-known area wellness centers.  She earned her CrossFit Level 1 & Judge’s Certificate to coach at local boxes and was chosen to judge top performing world athletes at the CrossFit Regionals and National Games Competitions, in Nashville, TN and Madison, WI. 

Daina obtained her 200 Hour YTT in Vinyasa through CorePower Yoga, Minneapolis, and is a Trauma Informed practitioner by Firefly International.  As a certified teacher of Mindfulness Meditation through Breath of Life Yoga Studio, St. Paul, Daina has a longstanding practice of insight and loving-kindness, and has dedicated much of her career to helping those struggling mentally and emotionally achieve greater well-being, centeredness, and compassion. 

Daina has completed a full Marathon (ONE was enough!) and several half marathons. Her ability to teach just about every format from Aqua Fitness to Indoor Cycling has presented opportunities for her to travel the globe as a guest fitness instructor to destinations such as Cancún and the Dominican Republic.  

In 2017, Daina founded a local Fitness/Yoga studio in Central MN which she fondly operated for 4 years.  The studio continues to successfully serve the community as a safe space for folks to exercise and practice yoga. 

Leading up to the pandemic, Daina received her Lifestyle Wellness and Nutrition Coach Certs and was also contracted to guide Meditation in large Corporate Wellness settings.  Sometimes leading mindfulness classes with 100+ executive professionals in attendance nation-wide. 

Daina brings her knowledge by holding space and working alongside folks to help them reach their personal goals, particularly through the lens of mindfulness. Fitness and Yoga have been a game changer for Daina and the thousands of students she’s coached over the years.  Her invite for Rejuv members is one of empowerment, peace, positivity and fun! 

Daina will be assisting in the every day duties of managing the gym, overseeing group fitness, and coaching classes.  


Tyler templin

Personal Fitness Manager

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Tyler was born in St. Cloud, MN, grew up in Gilman, MN and attended Foley High School where he was a 3 sport athlete (Basketball, Baseball, Football). After graduating from Foley High School, he attended the University of Jamestown to earn his Bachelor’s Degree in Kinesiology. Tyler played college basketball for two years at the University of Jamestown before transferring to the University of North Dakota. He earned his Bachelor’s of Science Degree in Kinesiology in 2017.

Tyler has been working in the fitness industry for over 5 years. Much of this time has been spent within management of the Corporate Wellness world. He enjoys working with clients of all levels to achieve their health and wellness goals.  Tyler’s training consists of functional movements, athletic performance, and compound based movements. In his free time, he enjoys spending time with his fiance and their dogs, his family and friends, watching and playing sports, as well as hiking and camping.

Tyler brings his expertise by ensuring folks are equipped with necessary knowledge and skills to make them more successful in their day to day endeavors.  His invite for Rejuv members is one of hard work, encouragement, personal growth, and laughter!

Tyler will be assisting in the every day duties of managing the gym, overseeing personal training, as well as coaching classes.


Christine Brown

Medical Weight Loss Program Manager


Trevor Ziwicki

Medical Fitness Specialist

Jay Grove

Jay Grove

Medical Fitness Specialist

Sara Kohn

Sara Kohn

Medical Fitness Specialist



Medical Fitness Specialist


Aimey Notsch

Studio Instructor


Nicole Neumann

Studio Instructor


Morgan Douvier

Studio Instructor

Executive Team


Joel Baumgartner, MD

Founder & Chief Executive Officer


Garrett Ewers

Chief Executive Officer and Vice-President

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