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How to Beat IBS & Never Worry About Digestive Problems Again!

About Us

Dr. Stephen Wangen, co-founder and Medical Director of the IBS Treatment Center, and his team have been successfully helping people resolve irritable bowel syndrome and chronic digestive problems since 1999. This success culminated in the 2005 opening of the IBS Treatment Center, the first clinic in the nation to focus solely on addressing this debilitating condition. Over the years the IBS Treatment Center has cared for a wide variety of patients. Some patients have had IBS symptoms so severe that they spent a considerable amount of time in the hospital. Others are no less frustrated with the impact that it is having on their lives. The thread that tied them all together was that they had never seen an IBS expert, a doctor whose only mission is to help people solve IBS.  The IBS Treatment Center is proud to have cured thousands of IBS patients.

Although the clinics are located in Seattle, Washington and Los Angeles, California, patients come to us from around the country and the world, and most now use our telemedicine service and avoid the travel. Patients have come from every state in the US and from over 30 countries!

Dr. Stephen Wangen

Dr. Stephen Wangen is the co-founder and Medical Director of the IBS Treatment Center. He is a licensed and board certified physician with a doctoral degree in naturopathic medicine and a bachelor’s degree in biology, with honors. He is the award winning author of two books on solving digestive disorders, and a nationally recognized speaker. He has been seen and heard on ABC, NBC, and Fox as well as public radio and television. He has also been named one of Seattle’s Top Doctors by Seattle Magazine.

His passion for being a doctor and solving digestive problems comes from a lifelong obsession with optimizing health. Having suffered from IBS as a young man, Dr. Wangen dedicated his life to solving this complex problem. He now hand picks and oversees other fine doctors at the IBS Treatment Center for the new specialty of IBS medicine. Since 2005 the IBS Treatment Center, with locations in both Seattle and Los Angeles, has successfully helped thousands of patients from around the country and the world end their digestive problems. Learn more about Dr. Stephen Wangen.

Dr. Paul Gannon

Dr. Paul Gannon is an IBS specialist and a licensed and board certified physician with a doctoral degree in Naturopathic Medicine. Dr. Gannon trained under Dr. Wangen and has over 20 years of experience working with patients and helping them achieve outcomes that they have been unable to get anywhere else.

Dr. Gannon is a founding member of the Gastroenterology Association of Naturopathic Physicians, a past President of the Colorado Association of Naturopathic Physicians, and a Fellow of the American Board of Naturopathic Oncology.

Dr. Gannon received his doctoral degree from the prestigious Bastyr University, and has also studied at Bucknell University and at Salzburg College in Austria. Also notable, he worked in a field hospital for the University of Miami Hospital in Haiti following the 2010 earthquake there.

Dr. Gannon loves to work with patients not only in his practice, but also is a certified yoga and cooking instructor, which he finds tremendously valuable as a physician.   Combining that with his specialized training in leadership at the Aspen based Roaring Fork Leadership Program makes him one-of-a-kind and uniquely positioned to work with challenging cases.

You’ll enjoy Dr. Gannon’s calm and personable approach, and you’ll especially enjoy his knowledge and the outcome that you’ll get working with him.

Dr. Amy Harding

Dr. Amy Harding is a licensed and board certified physician and an IBS and digestive disorder specialist who received her doctoral degree in Naturopathic Medicine and trained under Dr. Stephen Wangen. Previous to that she graduated summa cum laude from the University of Georgia in Holistic Medicine.

Dr. Harding has over 15 years of experience helping patients find solutions to difficult problems. She has always been a lover of science, which is an outgrowth of her passionate curiosity for the world around her, but appreciates that helping patients is both an art and a science.

She was an anatomy and physiology professor for seven years and has an extensive teaching background, which she finds valuable in her success with helping people.

Dr. Harding was voted a Phoenix Magazine Top Doctor from 2014-2021.

She enjoys hiking, reading, dancing, and spending time with her husband. And you’ll enjoy talking with her and experiencing her sharp mind.

Becky Rajcich, RD

Becky Rajcich is an IBS specialist nutritionist and a state and nationally certified Registered Dietitian Nutritionist, graduating with honors with a degree in Science of Nutrition. Becky’s food philosophy is that everyone has the right to eat food that supports their bodies and tastes good, and her expertise is in helping our IBS patients make their diets practical.

Becky specializes in taking challenging nutritional needs that can be overwhelming and breaking them down into simple, practical plans that can be incorporated into everyday life. She is also skilled at working with other dietary needs such as diabetes, weight loss, weight gain, disordered eating, low bone density, anemia, and other issues, integrating them with any food allergy or intolerance restrictions.

She brings compassion and commitment to her work with patients and finds joy in helping with them to get through nutrition challenges. Becky also enjoys running, reading, cooking, and recipe hunting; and she loves spending quality time with her husband, young son, dog, cat, and chickens. Patients and non-patients alike are eligible to schedule an appointment with Becky to work specifically on their nutritional and dietary needs.

Madison Service, RD

Madison Service is a Registered and nationally certified Dietitian Nutritionist, graduating with honors with a Bachelor’s degree in Nutrition from Colorado State University. She is an IBS specialist and works closely with all of the providers at the IBS Treatment Center. Madison believes the right kind of foods can be the most powerful form of medicine.

As someone who has personally experienced the debilitating effects of IBS, Madison particularly enjoys working with people who have digestive disorders and embraces the challenge of navigating restricted diets.  Working in partnership with the patient, she develops custom nutrition plans and menus tailored to meet individual needs of the client.  Inspired by her own personal journey, she enjoys supporting peoples’ health goals in a judgement-free, sensitive, and supportive environment through motivational coaching.   In addition to digestive wellness, she has experience providing nutritional guidance to those with diabetes, cardiovascular disease, weight management difficulties, and more.

Madison is committed to the success of her patients and strives to implement sustainable, realistic, and enjoyable dietary changes to enhance their quality of life.  In her free time, she is an adventure enthusiast and loves anything involving the outdoors including mountain biking, summitting peaks, and rock climbing.


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Los Angeles: 310-319-1500
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