Mederi Foundation
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Mederi Foundation
Donnie and Jennifer Yance founded Mederi Center in 2005 as a non-profit clinic, research and education organization dedicated to promoting longevity and improving the quality of life for those facing chronic diseases such as cancer, and stress or age-related conditions via a whole-systems, unitive approach to health and healing.

Our goal is to give patients and healthcare providers the tools to achieve enhanced vitality and a greater potential for survival. Our clinicians provide patients with a whole-systems, unitive approach to their healing, combining naturopathic medicine and traditional wisdom with convential and science-based medicine; especially in oncology and other chronic diseases.
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Donnie Yance, MH, CN, along with naturopathic physician Dr. Susan Saccomanno and certified herbalist Oscar Sierra, offer clinical support and expert care in evidence-based wholistic health services for anyone facing chronic illness or seeking guidance for lifelong wellness.

Applying a collaborative approach to healthcare, Donnie, Dr. Susan and Mr. Sierra meet weekly to review client cases and protocols, providing an effective and personalized approach for each individual.This means you benefit from the knowledge, skillsets, and forty years of combined clinical experience of our care team.
Throughout more than thirty years of clinical practice, Clinical Master Herbalist Donnie Yance's philosophy and practice has evolved into an integrative model called Mederi Care or the Eclectic Triphasic Medical System (ETMS).

This system is a distinctive approach to healing that calls for the integration of traditional, wholistic medicine with modern, allopathic medicine-thus creating a custom-tailored approach for each individual that relies on scientific research, logic, common sense, and intuitive wisdom.
Mederi Care practitioners expertly fuse botanical and nutritional medicine with mainstream, allopathic treatments. To learn more about our Mederi Care approach, listen to this podcast in which Mederi Center Founder and Lead Clinican Donnie Yance talks about plant-based treatments with a focus on cancer management.
Mr. Oscar Sierra brings more than a decade of clinical experience to Mederi Center, blending Traditional Chinese Medicine with modern Functional Medicine. He holds a Bachelor of Science in Nutrition Science from the University of Georgia and is board-certified in Herbal Medicine, Acupuncture, and Biomedicine through the National Certification Commission for Acupuncture and Oriental Medicine (NCCAOM).
Welcome to Mederi Center, where we are changing lives and transforming healthcare one cherished client at a time. Donnie Yance, MH, CN, along with naturopathic physician Dr. Susan Saccomanno and certified herbalist Oscar Sierra, provide clinical support and expert care in evidence-based wholistic health services for anyone facing chronic illness or seeking guidance for lifelong wellness.
Reviews (2)
Robin Keuneke
Robin Keuneke
Jun 13, 2016
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Mederi Foundation is a vitally important non-profit that I am honored to support. As a health writer/author, I have been able to interview all sorts of experts in the field of nutrition, such as cancer researchers, etc. and I can safely say that the work of this foundation is at the forefront of nutrition for persons facing chronic disease. This is the best help there is. The experts at Mederi work to improve the quality of life and in many cases extend the lives of those persons facing cancer. Also, the newest and most effective protocols for longevity and prevention are part of the mission of
Pam Copeland
Pam Copeland
Oct 13, 2014
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I cannot say enough wonderful things about the Centre staff and Mark Bricca, the Naturopath who has worked with my Mother, Charlotte Howard, during her journey of healing from a pancreatic cancer diagnosis in January 2011. My mother underwent the conventional cancer treatments (surgery, chemotherapy, radiation) and decided to enlist the Centre for help in rebuilding her immune system and digestion support. I had read the book, "Herbal Medicine Healing and Cancer" by the Centre founder, Donald Yance, early in my mother's treatment and continued to speak with her about working with the Centre. Mom