Academy Faculty & Staff
Tim Irving DC, MS ~ Director of Medical Education
Dr. Tim Irving is a chiropractor, massage therapist, and former dean in the School of Undergraduate and Graduate Studies and associate professor in the Naturopathic program at the National University of Natural Medicine (NUNM), in Portland, Oregon. Dr. Irving also has a master’s degree in Human Nutrition and over 15 years of clinical, lecturing, teaching, and curriculum development experience with both clinical and didactic educational programs.
Dr. Irving is a thought leader in natural medicine education. He enjoys taking complex processes and information and distilling that down to fundamental concepts to use as the bedrock of academic curriculum development. Dr. Irving's goal is to use his experience, skills, insights, convictions, and leadership philosophy to transform individuals and communities through education. He is rooted in the belief that education and critical thinking are key factors to healthy communities.
As the Director of Medical Education, Dr. Irving's primary role is to oversee the development, expansion, quality, and delivery of Mederi Foundation’s accredited online Academy. He is responsible for the strategic planning, direction, successful launch and ongoing development and oversite of our educational program content and activities including curriculum design, development, and delivery targeted to licensed healthcare professionals. Dr. Irving also helps to facilitate collaboration amongst faculty and key stake holders, as well as build professional alliances to further the use of Mederi Medicine in other healthcare clinics.
Jason Miller, DACM, LAc, Dipl. OM (NCCAOM) ~ Head of Faculty and Content Development
Drawing on over seventeen years of clinical practice that has focused on the management of chronic disease and cancer, Dr. Miller has developed a collaborative approach that bridges the time honored theory and practice of Traditional Chinese Medicine with modern biomedical therapies and diagnostic tools. Dr. Miller received his masters degree in acupuncture and oriental medicine from the Oregon College of Oriental Medicine in 2005, and his doctorate degree in Acupuncture and Chinese Medicine from the Pacific College of Oriental Medicine in San Diego in 2018. He is also certified as a Mederi Care Practitioner.
Dr. Jason established his Ashland-based clinic Jade Mountain Medicine in 2006, where has specialized in the management of patients with pain, cancer, neuromuscular disorders, and a host of chronic diseases. Since 2018 he also has worked with patients through https://drjasonamiller.com/ and its care team to provide comprehensive, collaborative care to patients with cancer.
Since 2005, Dr. Miller has worked closely with a group of distinguished colleagues and cancer experts including Donnie Yance CN, RH (AHG), founder of Natura Health Products, Mederi Center, and Mederi Academy, and Dr. Dwight McKee. Dr. Miller has served as the medical educator for Natura Health Products since 2006, was a practitioner in the Mederi Center from 2007-2011, and has been a core faculty member in the Mederi Center's Clinical Training Program since 2009. Dr. Miller currently serves as Lead Faculty and Director of Curriculum Integration and Implementation for the Mederi Academy.
In addition to his clinical work with patients, Dr. Miller lectures around the United States on botanical medicine, Traditional Chinese Medicine in the modern clinic, and on specific topics related to chronic disease. As teacher and doctor, Dr. Miller is able to simplify complex biomedical concepts, making them accessible to his students and patients. He brings a strong scientific background to bear on his work, and is a diligent evaluator of modern biomedical literature. Dr. Miller also has a deep love for nature and passionately explores the relationship between human ecology and disease. He shares this in a short documentary called "Cancer Culture" that explores why cancer is the disease of our time.
Dwight McKee MD, CNS, ABIHM ~ Faculty
Dwight McKee MD, CNS, ABIHM has been in medical practice since 1976, having explored many alternative/complementary approaches to cancer in his practice between 1976 and 1988. He then returned to 6 years of residency and fellowship to train in Internal Medicine, Medical Oncology and Hematology, and subsequently became board certified in all 3 disciples as well as in nutrition and Integrative and Holistic medicine. He practiced Integrative Oncology for 6 years after completing training as an oncologist, and then began to consult for other physicians working with cancer patients from the integrative side. He currently teaches with Mederi Academy, consults for groups interested in research in integrative cancer medicine, and has served as Scientific Director of Life Plus, an international nutraceutical company since 2000 to the present. Dr. McKee also serves on the Board of Directors for the Mederi Foundation and is a Certified Mederi Care Practitioner.
I am very excited about being part of the adjunct faculty for the Mederi Academy training program. Training clinicians in the Mederi Care / Eclectic Triphasic Medical System is very rewarding, and many more practitioners are needed to meet the growing awareness of, and need for, Integrative Cancer Care. I have taught with Donnie Yance for over a decade, and have learned much in the process. I am very interested in passing this on to a new generation of clinicians, to help people with cancer and other degenerative diseases.
~ Dwight L. McKee MD, CNS, ABIHM, Diplomate American Board of Medical Oncology
Mark Bricca, ND ~ Faculty
Dr. Mark Bricca earned degrees in Naturopathic Medicine and Classical Chinese Medicine from the National University of Natural Medicine. Born nearly three months premature with an inherited immune system deficiency, technologically advanced allopathic medicine helped him to survive. When he was five, his oldest brother Barry died due to complications of acute myelogenous leukemia, following a successful stem cell transplant with Mark’s donor cells. Mark thus grew up acutely aware of both the strengths, and inherent limitations, of allopathic medicine.
This early life experience is what led him to pursue studies in Naturopathic and Classical Chinese Medicine. A long-time practitioner of Buddhism and a student of Sufism, Mark’s practice of medicine and the work of facilitating healing has become less about patients’ pathology, test results, and “data,” and more about encouraging them to lovingly tend their bodies, as well as helping them find ways to fully open to whatever their life circumstances may be—whether easy or difficult, painful or peaceful.
After launching his private practice Bodhicitta Healing Arts in 2008, Mark worked alongside Donnie Yance with the team at the Mederi Center clinic from 2011 to 2014. Mark was also mentored by Dr. Dwight McKee for many years and took over Dr. McKee’s practice when he retired from private medical consulting in 2015. In 2012, Mark joined the Metta Institute’s two-year long training program in spiritually-oriented end-of-life care with renowned teachers including Frank Ostaseski, Ram Dass, and Rachael Naomi Remen, MD.
Mark is a Certified Mederi Care Practitioner and maintains his private practice focused in Integrative and Naturopathic Oncology. His clinical work with patients also includes addressing a wide range of complex chronic illnesses, particularly those relating to mold exposure, chronic infections, and Mast Cell Activation Syndrome.
Mederi’s unitive approach to healthcare provides a truly remarkable, deeply holistic framework—an accessible roadmap that practitioners can learn to implement and utilize across many healing disciplines. Mederi Care/ETMS offers tremendous gifts in its breadth and inclusivity; it is truly comprehensive in its scope, without being esoteric or confusing. This approach has enriched my clinical practice immeasurably, and changed me for the better as a person and as a doctor. It is therefore my great honor and privilege to have the opportunity to share this body of work with others, since I know in my heart that Mederi’s approach has important gifts to offer our world today. ~ Dr. Mark Bricca
Nancy Birang BS, MT (ASCP), NC ~ Faculty
Nancy Birang is a board certified nutrition consultant with over 20 years of experience in the holistic nutrition field. She is the owner of Four Seasons Nutrition - a private nutrition consulting firm in Los Gatos, CA. Since 2012, she has provided nutrition services for individuals, families, and caretakers at CancerCAREpoint in San Jose, CA. Nancy leads classes for other local nonprofits including Bay Area Cancer Connections in Palo Alto, WomenCare in Santa Cruz, and Wellness Within in Roseville, CA. As a faculty member of Bauman College of Holistic Nutrition and Culinary Arts in Berkeley, Nancy led classes in therapeutic nutrition for over 13 years.
As a strong advocate of nutrition education for children, families and communities, Nancy is the co-founder and current board president of Nourishing Generations, a nonprofit that brings chefs, nutritionists, and fitness specialists into schools and community centers to lead classes in hands on cooking, nutrition and fitness.
Nancy has a Bachelor of Science in Medical Technology from Northeastern University and completed a Clinical Applied Study from The New England Deaconess Hospital. She is certified in Holistic Nutrition from Bauman College, is Board Certified by the National Association of Nutritional Professionals, and is Certified in Herbal Medicine from The American School of Herbalism. Nancy has completed Levels I and II in the Eclectic Triphasic Medical System/Mederi Care.
I am honored to be part of the Mederi Academy and the Mederi movement. Besides the expansive technical knowledge that I can directly apply to client care, I am continuously inspired by the Mederi approach to whole person care- that beautiful synergy of body-mind-spirit medicine. I have learned to integrate the best of conventional medicine with the art of botanical healing to support my clients’ journeys toward health and happiness.
~ Nancy Birang, BS, MT (ASCP), NC
Susan J. Fidler, ND, MS, BS ~ Faculty
Dr. Fidler, ND, MS, BS trained at the College of Phytotherapy in the UK, where herbal medicine plays a vital and recognized role in the healthcare system. She has a Doctorate in Naturopathy (ND) and a bachelor of Science (BS) degree in Herbal Medicine as well as a master’s degree (MS) in molecular biology from the University of Maryland and a second BS in Information Science from Leeds Polytechnic Institute. She was admitted to the prestigious College of Practitioners of Phytotherapy following rigorous clinical examinations at the London Clinic of Phytotherapy. Dr. Fidler is also a Registered Herbalist with the American Herbalist Guild.
Since qualifying, Dr. Fidler has continued her education through regular conferences and training courses in the US and the UK. These specialist courses include care for cancer patients, detoxification, brain chemistry, functional endocrinology, and brain and neurotransmitter function. She is also qualified in Total Body Modification (TBM).
Dr. Fidler founded Riverdell Herbs, LLC in 2002 and has been in full-time practice ever since. Her practice incorporates a wide range of clients, many of whom have struggled with methylation defects, Lyme disease, and gluten intolerance. She still takes time to wild craft some herbs and makes almost all her own tinctures, creams, decoctions, etc., while using high quality supplemental products as needed.
“Being able assist others, especially those in the medical field, to incorporate natural approaches to healthcare is important to me. I am invigorated to be part of such an eminent team where we can each excel in our strengths and launch others out into an effective integrative practice. I have benefited from the wisdom of Donnie Yance in the past (and present!) and am delighted to be in a position where I feel I can give something back.” ~ Dr. Susan Fidler
Oscar Sierra, Certified Herbalist, RH (AHG) ~ Faculty
Oscar Sierra holds a Bachelor’s degree from the University of Georgia in Nutrition Science and an Anthropology minor in Traditional Medicine. Oscar also completed over 3,000 hours of hands-on training and national board exams to earn Board Certifications in both Herbal Medicine and Acupuncture. In addition to his ongoing continued education in Chinese Medicine, Oscar also studies biomedical and systems engineering fields of Functional Medicine and Wholistic Oncology.
Oscar is passionate about the Patient-Centered care approach of the Eclectic Triphastic Medical System (Mederi Care) and has been practicing as a Certified Mederi Care Practitioner since 2021. Blending Traditional Chinese Medicine with modern Functional Medicine, Oscar practices telemedicine out of the Mederi Center clinic, as well as at Sierra Botanica & Collaborative Medicine in Sandy Springs, Georgia.
In addition to his clinical work, Oscar is a speaker at various state, regional, and national herbal and functional/integrative medicine conferences. He also practices and teaches Martial Arts (2nd Dan Black Belt, Chi Budo Kwon) and enjoys volunteering with group acupuncture treatments for the homeless at a free community clinic in Georgia. He is an active member of the American Herbalists Guild (AHG), International College of Integrative Medicine (ICIM), National Association of Environmental Medicine, and the Society for Integrative Oncology (SIO).
Vivian Dinssa ~ Project Manager and Learner Coordinator
As Project Manager, Vivian engineers and maintains all the systems and processes that help keep our Academy team organized and on track. In her role at the Learner Coordinator, Vivian is the primary point of contact for applicants and enrolled students, helping to address questions, troubleshoot, problem-solve, and to ensure a positive and successful experience for our learners as they interact with our curriculum and learning management system. With many moving parts to our comprehensive online training program, the job of coordinating faculty and staff, as well as communicating with our learners is no small task!
Vivian has an MA in Human Dynamics from Western International University, as well as a BA in Anthropology. She comes to us with formidable professional experience in LMS administration, as well as project coordination and management. With her talents in administrative and business analytical skills, along with her personable and friendly demeanor, Vivian has become an invaluable member of the Academy team.
Lisa Newton ~ Education Outreach Coordinator
As the Education Outreach Coordinator for Mederi Academy, Lisa is the primary contact for prospective students, and is available to answer questions and respond to inquiries about our program. She also helps support some of the administrative functions of the education department. With over fifteen years of previous healthcare experience, and several years working in patient services at the Mederi Center clinic, Lisa is intimately familiar with the immense value of integrative care and the methodology taught through Mederi Academy. She also brings experience in health education, having worked as head health coach at an integrative health center, implementing wellness program and teaching classes in health and nutrition to hundreds of people. Lisa holds nutrition certifications from Bauman College and The Institute for the Psychology of Eating. Her experience in the healthcare field and as an educator makes her the ideal resource for healthcare providers interested in Mederi Academy.
Melissa Pedersen ~ Office Administrative Assistant
With a Masters in Educational Technology, Melissa is ideally suited for handling her support role in the Academy – especially with her background in business development, project management, project progress documentation and reporting, systems analysis, and the creation and development of classroom and computer-based training/support programs as well as the requisite foundational curriculum to implement them.
Melissa is passionate about supporting the training programs that educate practitioners about all facets of the ETMS so that they can create personalized patient protocols, and increase their expertise in diagnostics and therapeutics.
Donald R. Yance ~ Mederi Academy Founder, Faculty, and Principal Architect of the Mederi Care Methodology
Donnie Yance is a Clinical Master Herbalist, Certified Nutritionist, and Certified Mederi Care Practitioner renowned for his extraordinary knowledge and deep understanding of the healing properties of plants and nutrition, as well as epigenetics, laboratory medicine, oncologic pathology, and molecular oncology. He is a professional member of the American Herbalists Guild and the National Association of Nutrition Professionals. Donnie is also professed as a Secular Franciscan, which equips him with the breadth and wisdom to touch on the spiritual aspects of healing.
Donnie conducts his clinical practice as the Lead Clinician at the Mederi Center in Ashland, Oregon utilizing Mederi Care (also known as the Eclectic Triphasic Medical System or ETMS), an integrative approach to patient care he developed over more than twenty years of successful clinical practice. The Mederi Care model elegantly combines Donnie's passion for the latest scientific research with the wisdom of ancient healing traditions, resulting in a compassionate, creative, intelligent, and effective approach to healing. As a visionary leader, mentor, teacher, author, and healer, Donnie’s methodology has transformed thousands of lives and is carried out through the mission and programs of the Mederi Foundation.
Jennifer Yance ~ Mederi Academy Founder, Mederi Foundation Executive Director
Jennifer Yance's work at the threshold of the organization has been a key element to its growth and accomplishments. With her impassioned determination and an aura of inspiration, she oversees and directs the fundraising, clinical, research, and education programs and gracefully guides the organization in serving its mission.
Jennifer’s business acumen, effective leadership, and deep commitment to healthy living contribute to her ability to help the organization reach its highest potential for serving humanity.