Mark Pimentel, MD, FRCPC
Mark Pimentel, MD, FRCPC is Director of the Gastrointestinal Motility Program and Laboratory at Cedars-Sinai Medical Center. Dr. Pimentel also serves as Assistant Professor in Residence for the David Geffen School of Medicine at the University of California, Los Angeles (UCLA).
Board certified in internal medicine and gastroenterology, Dr. Pimentel has been awarded various investigator-driven grants related to gastrointestinal motility. His primary research interests involve irritable bowel syndrome and its relationship to small intestinal motility and bacterial overgrowth. Other interests include gastric motility in diabetes.
Dr. Pimentel is a member of several professional organizations, including the Medical Council of Canada, American Gastroenterological Association and American College of Gastroenterology. He has written articles for such peer-reviewed publications as the Archives of Internal Medicine, American Journal of Gastroenterology, Journal of Clinical Gastroenterology and Digestive Diseases and Sciences.
Dr. Pimentel received his bachelor’s and medical degrees from the University of Manitoba in Winnipeg, Canada. He completed his internal medicine residency at the University of Manitoba Health Science Center. His fellowship in gastroenterology is from the UCLA Integrated Training Program in Los Angeles.
Dr. Gerard Mullin is an associate professor in the department of medicine as well as director of Integrative Gastroenterology Nutrition Services and director of Capsule Endoscopy at The Johns Hopkins Hospital. Nationally and internationally renowned for his work in integrative gastroenterology and nutrition, Dr. Mullin has accumulated over 15 years of clinical experience in the field of integrative gastroenterology and earned his master’s degree in nutrition while in practice. He is an associate editor of several nutrition and integrative medicine journals. Dr. Mullin was selected by Dr. Andrew Weil to serve as a senior editor for the first book for physicians on integrative gastroenterology by Oxford Press to be released in May of 2011. He also is former president of the Maryland and Long-Island Societies of Parenteral and Enteral Nutrition In 2009 he was named by the American Dietetic Association’s honorary member of the year.
Dr. Mullin has been interviewed on radio and television and has contributed to stories in The New York Times, the Associated Press, ABC News, Good Morning America, Chicago Tribune, Newsday, Martha Stewart Living, Rodale Press, Consumers Digest, Reader’s Digest, Prevention, Natural Health magazine, More Magazine, Ladies Home Journal, Body & Soul, Cooking Light, Women’s World, Men’s Health, Good Housekeeping, Glamour and more.
Dr. Mullin’s biography has been included in Marquis Who’s Who in the World and in Marquis Who’s Who in America numerous times. His contributions and discoveries have led to multiple awards and his continued selection as one of America’s Top Physicians by the Consumer’s Research Council of America since 2004. Dr. Mullin was the youngest person to receive an Honorary membership from the American Dietetic Association in 2009. He also received the Grace A. Goldsmith award presented by the American College of Nutrition in November 2011. This special award acknowledges a scientist who is under the age of 50 years, for significant achievements in the field of nutrition. He is a founding member of the American Board of Integrative Medicine and is board-certified in internal medicine, gastroenterology and nutrition. Dr. Mullin also serves on the editorial board of numerous journals for gastroenterology, nutrition and integrative medicine.
Allison Siebecker, ND, MSOM, LAc
Dr. Allison Siebecker has worked in the nutritional field since 1988 and is a 2005 graduate of The National College of Natural Medicine (NCNM) where she earned her Doctorate in Naturopathic Medicine and her Masters in Oriental Medicine. Dr Siebecker is the Medical Director of the SIBO Center for Digestive Health at NCNM Clinic in Portland, OR, where she specializes in the treatment of SIBO. She is instructor of Advanced Gastroenterology at NCNM, teaches continuing education classes for physicians, is the author of the educational website siboinfo.com and is writing a book synthesizing the SIBO data into one source. In 2005 and 2013, she received the Best in Naturopathy award from the Townsend Letter for her articles “Traditional Bone Broth in Modern Health and Disease” (2005) and “Small Intestine Bacterial Overgrowth: Often Overlooked Cause of IBS” (2013).
Dr. Leonard Weinstock was born and raised in New York and moved to St. Louis in 1985. Dr. Weinstock received a BA Magna Cum Laude from University of Vermont and the medical degree from University of Rochester School of Medicine. He completed his postgraduate training and was chief resident in Internal Medicine at Rochester General Hospital. His Gastroenterology Fellowship was performed at Washington University School of Medicine in St. Louis.
Dr. Weinstock is Board Certified in Gastroenterology and Internal Medicine, and is president of Specialists in Gastroenterology and the Advanced Endoscopy Center. He teaches at Barnes-Jewish Hospital and is an Associate Professor of Clinical Medicine and Surgery at Washington University School of Medicine. He is an investigator at the Sundance Research Center and has participated in many research studies.
He is actively researching the connection of the gut and small intestinal bacterial overgrowth (SIBO) with several medical problems including restless legs syndrome, rosacea and chronic pelvic pain syndromes. He presented several lectures in Oregon at the first SIBO symposium and in France at the international rosacea study group. He is actively researching the role of LDN in several medical syndromes. Dr. Weinstock is an active lecturer and has published more than 75 articles, abstracts, editorials, and book chapters. A complete CV is available at www.gidoctor.net.
Dr. Lisa Shaver is a primary care physician who incorporates Naturopathic medicine and Chinese medicine to treat women and men. She graduated from the National College of Natural Medicine in Portland, Oregon with a Doctorate in Naturopathic medicine and a Masters of Science in Oriental medicine. She co-founded and runs Everyday Wellness Clinic in downtown Portland, where she maintains a private practice, focusing on gastrointestinal disorders such as SIBO, celiac disease/non-celiac gluten sensitivity and IBD, endocrine imbalances, autoimmunity and psychiatric conditions.. Dr. Shaver is an adjunct professor at the National College of Naturopathic Medicine. She is also the branch manager for the Gluten Intolerance Group of Portland, and is the interim President of the Gastroenterology Association of Naturopathic Physicians. (http://gastroanp.org/) She is a silent member of the SIBO Center for Digestive Health.
Dr. Shaver is trained in Functional Gastroenterology, Functional Endocrinology, Functional Neurotransmitter Balancing, Functional Blood Chemistry Analysis and Functional Neurology. Dr. Shaver particularly enjoys working with food and nutrition, and lifestyle modifications as a means to regain health and vibrancy, as well as botanical medicine, targeted therapeutic agents such as vitamin/mineral protocols, and acupuncture and cupping.
Dr. Shaver is adjunct faculty at NCNM and lectures in the Advanced Gastroenterology class on Celiac disease, non-celiac gluten sensitivity, food sensitivities and food allergies to medical students. Dr. Shaver presented at the Naturopathic Gastroenterology Conference and lectured on Recognizing Celiac Disease and Gluten Sensitivity. Dr. Shaver regularly lectures on topics as varied as identifying food sensitivities, improving digestion and recognizing Celiac disease land non-celiac gluten sensitivity. Dr. Shaver has also written articles for local newspapers and has been quoted in The Oregonian, and other media.
Dr. Shaver grew up embracing a lifestyle full of healthy cooking, nutritious eating, exercise and the love of the outdoors. While growing up she actively participated in swimming, sailing, tennis, volleyball, hiking and running. Dr. Shaver is a former Peace Corps Volunteer. She served four years in the Central African Republic as a public health educator in maternal and child health care, and HIV/AIDS prevention liaison to at-risk women. She lived both in the bush in a mud hut for two years as well as in the tiny capitol of Bangui, working with the Ministry of Health (of the equivalent of the US Department of Health and Human Services). She taught these high-risk women entrepreneurial and small business skills. She has worked in Washington, DC for the American Red Cross and has volunteered extensively and passionately her entire life.
Steven Sandberg-Lewis, ND, DHANP
Dr. Steven Sandberg-Lewis is a practitioner of naturopathic gastroenterology. He has been in practice for 36 years, the first 18 years in private practice. In 1996 he joined the full-time faculty of the National College of Natural Medicine (NCNM) in Portland, Oregon. He engages in patient care four days per week and is a professor of gastroenterology.
He is a frequent presenter at educational seminars around the US and Canada. In 2013 he was listed among “Top Docs” in Portland Magazine. As co-founder of the SIBO Center for Digestive Health at NCNM, Dr. Sandberg-Lewis often treats patients whose health conditions have defied diagnosis despite exhaustive medical testing. Restoring ideal digestive function and normalizing the gut microflora have earned the center a reputation for success in helping many who previously suffered digestive diseases without hope of cure.
Areas of focus include GERD, IBD, biliary dyskinesia, SIBO and intractable nausea/vomiting. Sandberg-Lewis is the author of the textbook Functional Gastroenterology: Assessing and Addressing the Causes of Functional GI Disorders (NCNM Press; 2009).
Melanie Keller, ND
Dr. Melanie Keller is an NCNM alumna and SIBO Center physician specializing in the treatment of digestive disorders. Her evidence-based naturopathic approach focuses on addressing the whole person. She utilizes functional testing, nutrition, energetic psychology techniques, and visceral and structural manipulation.
While a student at NCNM, Dr. Keller had the privilege of an extensive internship with the renowned Dr. Steven Sandberg-Lewis. His influence during and after this internship has greatly enhanced Dr. Keller’s practice philosophy. She has also been honored to receive post-graduate extended training in Small Intestine Bacterial Overgrowth (SIBO) with Dr. Allison Siebecker. Dr. Keller has applied this training in her functional medicine practice where she has helped many patients to restore their health and vitality.