The experienced healthcare providers at NIVA Health specialize in helping relieve pain and addressing your toughest symptoms with natural remedies to help you avoid surgery and stay off medications. At NIVA Health, we work hard to exceed your expectations.
Please take a moment to learn more about our team of providers below.
Marissa is a board certified Physician Assistant licensed in the state of Georgia who works in NIVA Health’s office in Woodstock, Georgia. She received his Bachelor of Science in Biology from Piedmont College in 2017, followed by her Masters of Physician Assistant Studies from High Point University, NC in August of 2020. Her past experiences surround the realm of orthopedics. Marissa played soccer in college and still loves any chance to be involved with sports and athletes. At NIVA Health, Marissa is an integral part of helping patients heal, recover, and ultimately alleviate their pain without the need for surgery or long term medications.
Dr. Steven Burack is a board-certified physical medicine and rehabilitation (PM&R) physician.
Dr. Burack received his medical degree from the College of Osteopathic Medicine at the New York Institute of Technology. He has practiced throughout Florida and specializes in PM&R and pain management.
Dr. Burack is the supervising physician for the Florida NIVA Health offices.
Dusty, a Melbourne native, has joined the NIVA Health Melbourne team as a Patient Experience Manager. He was originally a high school band teacher in Jacksonville,FL but moved to the healthcare industry to share his passion for wellness after making radical changes to his health. While he no longer plays the french horn regularly, you can always find him noodling or strumming on something that makes noise when he's not prepping for a powerlifting meet or watching the game.
Dr. Foster Cullum is a board-certified Chiropractic Physician and recent
medical school graduate who has been in the healthcare profession for over 27 years. He graduated from Palmer College of Chiropractic in October 1992 with BS and DC degrees. He then went on to practice for 22 years before realizing, as a Chiropractor, he was only treating 8-10% of the population and witnessed multiple patients over-medicated on addictive pain medication. He then decided to further his education and attended the University of Science, Arts and Technology (USAT), and graduated in December 2018 with his MD/MBBS and Masters’ degrees.
Originally from Toledo, Ohio where he had at one point three Chiropractic practices and loved helping people naturally; he and his family decided the sunshine in Florida was where they wanted to be. He and his wife, Sheila and two children now reside in the Jacksonville, Florida area and are blessed to be here. He is very excited to educate the community on stem cell therapy and regenerative medicine and can’t wait to meet others searching for answers to their pain-related problems and other conditions. He explains that now there is a cutting-edge technology which allows us to no longer just mask pain and treat symptoms, but instead Regenerate and Rejuvenate your body from within. In 2019, Dr. Cullum became a team member with NIVA Health in the Jacksonville, Florida office and looks forward to many more years to come.
Dr. Joseph DuPont received his medical and surgical training in France and internationally.
Dr. DuPont has presented to his peers on the topic of bone grafting and hosted a television series on regenerative bone medicine. He has authored a multitude of medical publications.
He hosts virtual consults for NIVA Health’s offices in Florida.
Dr. Easley is an accomplished physician with vast and comprehensive medical knowledge. NIVA Health is honored to have him as the Supervising Physician for the Woodstock, GA office. He has been certified by the American Board of Family Physicians since 1978 and has been recognized as a Fellow of the American Academy of Family Physicians since 1993. With over 45 years of experience, his emphasis and insistence on providing the very best quality care has never wavered. He continues to be well respected among colleagues and patients alike for his medical expertise, integrity and delivery of exceptional and compassionate care.
Kathryn is a board-certified family nurse practitioner. Kathryn received her Bachelors of Science in nursing in 2014 from Wayne State University. She obtained her CCRN and was an ICU nurse for five years working at both Providence Hospital and Henry Ford Hospital. She also worked as a traveling ICU nurse where she travelled around to different hospitals throughout the United States.
She went on to obtain her Master of Science in nursing in 2019 from Walden University. Kathryn is currently pursuing her functional medicine certification from the Institute for Functional Medicine. She is now a part of our Wixom, Michigan NIVA Health team.
For over 14 years, Dr. Rafael Foss has been a distinguished leader in the field of wellness lifestyle programs, natural pain treatments and cutting edge regenerative cellular medicine therapies including anti-aging and aesthetics services. Over 40,000 people have enjoyed the health benefits and transformational power of Dr. Foss’s health centers, now collectively known as NIVA Health. According to Dr. Foss "to doctor means to teach" and teaching healthy lifestyle choices and lifestyle potential is his top priority. Dr. Foss grew up with many health challenges including allergies, asthma and severe back pain due to scoliosis. These challenges drove him to create a pathway to better health for himself and to share that path with as many people as possible. His passion empowers others to live their full expression of health and thereby positively impact themselves, their family and their community.
Dr. Foss is the founder of NIVA Health, which has become one of the nation’s premier and fastest growing natural health centers. He has been featured on ABC, NBC, CW, FOX and many talk radio stations across the country to share his knowledge. Dr. Foss’s approach focuses on supporting and utilizing the body's ability to heal itself by creating and maintaining homeostasis within the body.
Dr. Foss received his Bachelor of Science in Human Biology from S.U.N.Y. Albany, NY. He is a board certified chiropractic physician and completed his studies in applied kinesiology. He received a Doctor of Pastoral Science and Medicine license from the Professional Wellness Alliance and received training under the Carrick Institute Neurology Diplomate Program. Dr. Foss is also a member of the Foundation for Wellness Professionals, a non-profit which serves the community on a regular basis through educational talks with a focus on disease prevention.
Dr. Foss, his wife Alina and their daughter currently reside in Jacksonville, Fl. His family enjoys going to the beach, exercising and experimenting with delicious and healthy foods.
Dr. Gary Guarnaccia earned his undergraduate degree in Biochemical Engineering from Columbia University and received his Doctor of Medicine degree from NJ College of Medicine in 1974. He completed his residency at NYU Bellevue Hospital. Dr. Guarnaccia has been in the field of Gynecology and Obstetrics for over 36 years and has received numerous awards including Castle-Connolly Top New York Doctors Award of New York. He is an accredited GAINSWave® provider specializing in erectile dysfunction treatment for men. Currently serves as a Clinical Assistant Professor at Rutgers Medical School and the Medical Director for NIVA Health’s Manalapan, NJ office.
Kristin has been a nurse for over 6 years. She received her undergrad from Illinois State University where she was a member of the D1 Women’s Swim team while obtaining her BSN. After graduating with her undergrad, she began her career at Northwestern Memorial Hospital where she took care of Gynecology/ Hematology-Oncology patients. She often cared for postoperative oncology patients, prepared patients for stem cell transplants, managed and administered chemo as well as assisted physicians in a wide variety of procedures. After three years in oncology, she switched gears and became a labor and delivery nurse. After just six months she was promoted to a charge nurse where she managed a 6-bed labor and delivery unit with 2 ORs, a 14-bed postpartum unit and a 9-bed special care nursery.
In May 2019, Kristin earned her MSN, APRN from Olivet Nazarene University. Caring for people is Kristin’s passion and she feels fortunate to have had the privilege to care for individuals in such different environments and circumstances. She feels that these experiences have only helped her to become well-rounded in her care and able to understand patients' needs throughout their lifetime.
Kristin has a very holistic outlook on care. She knows that to truly care for patients, you need to care for them in mind, body and spirit. When Kristin is not caring for her patients at our NIVA Health Naperville location she enjoys spending time with her fiancé, working out, watching movies and cooking up delicious meals.
Dr. James Joseph is a board-certified family medicine physician who has specialized in regenerative medicine for more than 20 years.
Dr. Joseph received his medical degree from Michigan State University in 1998 and then completed a fellowship in regenerative medicine. He has completed additional studies in stem cell harvesting, orthopedic application of stem cell therapy, and advanced aesthetics.
He is a member of a number of professional organizations, including the Academy of Anti-Aging Medicine.
Dr. Jason Lamarche attended the University of Ottawa in Ottawa, ON, Canada to study biology. After graduating with an honors bachelor of science in biology, he moved to Dallas, TX in 2006 to attend Parker College of Chiropractic. He graduated with his Doctorate of Chiropractic in 2009. During his studies at Chiropractic College, he studied various subjects such as anatomy, physiology, radiology, neurology, pathology, microbiology and many others. Dr. Lamarche earned a certification at Parker College as a Certified Clinical Chiropractic Neurologist in 2009.
Dr. Lamarche decided to attend chiropractic school after his father was diagnosed with a heart and lung condition that was so bad he was given 6 months to live. Medicine had no answers for him. He went to see a chiropractor who found that his spine was out of alignment and was putting so much pressure on the nerves going to his heart and lungs, it was causing those organs to shut down. Once he went through a series of spinal adjustments, his health was restored back to normal.
He is also certified in acupuncture. Acupuncture is a different approach compared to western medicine, and he himself was skeptical of whether or not it actually worked until he had a severe injury to both of his elbows. He had tendinitis that was so bad he couldn't even lift a bag of groceries. After trying everything, with minimal success he was thinking of going for a surgical consult, when a friend of his, who is an acupuncturist, offered to help him. After allowing her to treat him, his arms started to heal almost instantly. It was truly amazing. After that he felt required to learn this craft and now uses acupuncture on many of his patients.
He also served as the team physician for the Joliet Jaguars midget hockey team in 2009-2010. His main areas of interest comprise of neurology, pediatrics and lifestyle wellness. In his time off Dr. Lamarche enjoys playing hockey, golf, fishing and the outdoors.
Sheryl is a board-certified Family Nurse Practitioner. She received her Bachelor of Science in nursing in 1999 from Oklahoma City University. In her nursing career, she worked in various fields including post vascular, open heart, hospice and orthopedics. In 2018, Sheryl received her masters as a Family Nurse Practitioner. Sheryl has a strong passion and knowledge in working with regenerative medicine, infusion therapy, joint injections and PRP. She is also seasonal in evaluating and performing yearly wellness visits. We are thrilled to have her as a part of the NIVA Melbourne, FL team.
Rebecca has been a nurse for over 28 years and received her APRN from Maryville University of St. Louis in 2014 as part of the President's List. After graduation, she spent five years in Jacksonville, Florida working at a local hospice company, where she was the very first practitioner hired to help build her department. In this role she traveled through five counties (Nassau, Clay, Duval, Baker, and St. Johns) in order to visit patients in their homes and at facilities. She provided primary care, end of life care and palliative hospice care.
In January 2020, Rebecca realized her true passion was with regenerative health and integrative therapies. She has collaborated with chiropractors and physical therapists to provide primary care, sports medicine and holistic patient care. Rebecca has extensive experience with trigger point injections and joint injection therapy as well as stem cell and PRP therapies. She believes that patients are like family and has a personal passion to provide quality patient care while getting to the root cause of a patient's health care issues.
Rebecca is such a believer in weight loss and holistic care, that she started as a client of Dr. Foss' original practice. After years of being a client and experiencing the family atmosphere, she reached out to work for the very company that aligned with her values. Rebecca currently provides a collaborative team approach with our physicians in order to provide individualized treatment plans to put the patient first. When she’s not caring for her patients at our NIVA Health Jax location, Rebecca works with military veterans. She also enjoys spending time with friends, exercising, reading and singing.
Jaime is a Board Certified Adult Gerontology Nurse Practitioner. She earned a Bachelor of Science in Nursing from Ramapo College of New Jersey in 2013, followed by Masters of Science in Nursing from Wilkes University in Pennsylvania. Jaime is Board Certified by the American Academy of Nurse Practitioners.
Jaime began her career as an emergency room nurse at a busy Saint Peter’s University Hospital where she spent the past 6 years. With her love for ER, Jaime became certified as an emergency nurse. Given her experience in ER, Jaime is highly experienced, focused, fast and precise.
Prior to becoming a nurse, Jaime began her patient-care career as an EMT, she has always been passionate about helping others
Jaime believes in developing strong relationships with her patients and looks forward to providing high quality, personalized care tailored to meet each patient’s specific needs at our NIVA Health Manalapan location.
In her free time, Jaime enjoys spending time with her husband, family and fur baby Diesel. She is an avid reader, runner and beach lover.
Dr. Chris Niedzinski is a leader in the fields of wellness, pain management, and regenerative medicine.
His revolutionary stem cell therapy program has proven successful for his patients countless times. After seeing its positive impact, he has become dedicated to helping others experience the life-changing effects of regenerative medicine.
Dr. Niedzinski works in NIVA Health’s office in Wixom, Michigan.
Greg joined our team this year after 17 years in the aviation industry, 10 of the last 17 years he was a pilot for EMS Medivac in the Atlanta area. Greg studied biology in his undergrad and worked as a patient care technician in the Emergency Department. With a love for science and passion in regenerative medicine he is now part of NIVA Health Woodstock, Georgia office. In his free time he enjoys family and friends, martial arts, outdoors, scuba diving and spearfishing.
Dr. Zack Stalnaker is a board-certified chiropractic physician.
Dr. Stalnaker received his undergraduate degree as well as his doctor of chiropractic from Life University in Marietta, Georgia – the largest chiropractic school in the world. In addition, Dr. Stalnaker has undergone training in diet, nutrition, and exercise and is certified in the SHINE protocol for the treatment of ADD / ADHD.
At NIVA Health, Dr. Stalnaker works with many athletes and has extensive experience working with pregnant women and pediatric patients. Dr. Stalnaker works in NIVA Health’s office in Jacksonville, Florida.
Dr. Stalnaker was drawn to chiropractic care after he sustained a neck injury while surfing. After a few months of chiropractic care, he found he had not only recovered from his accident but also solved health problems that had plagued him for decades: sinusitis, migraines, allergies, and acid reflux. He is now able to control these conditions without having to take medication.
Dr. Stalnaker is active in a number of professional organizations, including the Christian Chiropractic Association, Florida Chiropractic Association, and the North Florida Chiropractic Society.
In his spare time, he enjoys spending time with his wife and two children, going to the beach, and working out.
NIVA Health is proud and fortunate to have Brett as our men’s wellness specialist. He comes from a family of health care providers and is intimately familiar with the needs of patients. Brett is highly focused as an experienced Men’s Health advocate as he has personally been through NIVA Health’s men's wellness program to address his own personal needs. Once a client is cleared by our provider, Brett will take the patient through the process of preparing the patient for the protocols as well as addressing the finance process. Brett is a fan favorite for our clients and is known for creatively “getting things done”.
Samantha always knew she wanted to be in the medical field after her father received a heart transplant. She obtained her Medical Assisting certification 5 years ago in Fort Worth, Texas. After completion she moved back home to Florida and started her career in primary care. She came to NIVA Health Melbourne with regenerative medicine experience knowing the power and help it provides to patients. Samantha is very family orientated and spends her free time getting together at her mother’s with her siblings. Her hobbies include going to the gym, eating at new restaurants and watching her nieces grow up.
Alex joined the NIVA Health team in November 2020 after completing her M.S. in Industrial/Organizational Psychology. She has more than 10 years of team management experience within the hospitality and medical office industries and has a passion for motivating and inspiring her team. As a RYT 200 certified yoga and meditation instructor, Alex enjoys providing support and guidance to improve the quality of the mental and physical wellbeing of her clients. We are thrilled to have Alex as the office manager in our NIVA Health Jacksonville, FL. location. During her spare time, Alex enjoys spending time with her fiancé and their two dogs, traveling, yoga and weight lifting.
Michelle has an Associates of Arts degree from Jacksonville University. She is certified through NASM in personal and group fitness training. Prior to joining the NIVA Health family in 2015 she spent 4 years as a personal trainer helping clients lose weight and reach their fitness goals.
She is very passionate about sharing her knowledge of our programs that have specifically helped her overcome some of her own challenges with an auto-immune disease. She loves helping others and being able to share a program that changes lives!
Michelle lives near the beach in Jacksonville with her husband, teenage daughter and 8 year old son. Spending lots of time with her family, cooking, biking, and going to the beach are some of her favorite past times.
Renee has an Associate Degree in Fashion Merchandising and a minor in Interior Design from Patricia Stevens Career College and Finishing School, Milwaukee, WI. Prior to joining NIVA Health in March 2019, she was a Clinic Director for a Medical Spa and spent over 20 years in the Fine Jewelry Industry as a Jewelry Designer, Sales Professional and a Business Owner of Custom Fine Jewelry Store.
She truly enjoys sharing her passion of helping and educating others by coaching them to reach their wellness and weight loss goals. Helping people feel confident in themselves is why Renee is motivated every day to help make a change in someone's life.
Renee is married and has four daughters. Her favorite pastimes are being with her family, traveling, crafts, shopping, long walks with her dogs and being a Cheer Mom.
If you have any additional questions about the NIVA Health team of healthcare professionals, give us a call at (866) 377-5872, and we’ll be happy to help. You may also request an appointment right now.