About us

Dr. Wangen, co-founder of the IBS Treatment Center, has 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. In conjunction with the new clinic, Dr. Wangen also released his first book, The Irritable Bowel Syndrome Solution.

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 simply 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, nor gotten the right kinds of testing and treatment to identify and resolve the issues causing their IBS. The IBS Treatment Center is proud to have cured thousands of these patients.

Although the clinics are located in Seattle, Washington and Santa Monica, California, patients come to us from around the country and the world (locations listed below). Over 50 million people in the United States suffer from IBS, and the map below gives you an idea about how far people will travel to have this condition properly addressed. They have come from every state in the US other than South Dakota, and from every occupied continent on earth!

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Dr. Stephen Wangen

Seattle Office: (206) 264-1111

Dr. Stephen Wangen is the co-founder and Medical Director of the IBS Treatment Center. He is a licensed and board certified physician, 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 was recently 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 trains other doctors at the IBS Treatment Center in 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.


Dr. Kelly Baker

Seattle Office: (206) 264-1111

Dr. Kelly Baker has both a personal and professional interest in food allergies and digestive problems. She was diagnosed with celiac disease in 2009 and has been gluten free ever since. This experience has given her a keen understanding of the power of food allergies and the body’s potential for healing.

Dr. Baker is a licensed physician with a doctoral degree in Naturopathic Medicine from Bastyr University. She graduated with honors from Michigan State University with dual bachelor degrees in Human Physiology and Linguistics. While studying medicine, she also earned her Masters of Science in Acupuncture.

She is also an accomplished speaker and loves to work with and educate her patients. She is a great asset to the IBS Treatment Center and looks forward to the opportunity to help you.

Dr. Sanaz Forghani

Dr. Sanaz Forghani

Santa Monica Office: (310) 319-1500

Dr. Sanaz Forghani is a long time resident of Los Angeles and is a licensed and board certified doctor with a doctoral degree in Naturopathic Medicine. She received her bachelors degree in psychology from UCLA, where she also did her premed studies.

Dr. Forghani’s personal history of overcoming digestive issues has contributed greatly to her passion for helping patients with digestive disorders. Dr. Forghani thrived in a culturally rich upbringing and continues to enjoy spending time with her family and friends in Los Angeles. She loves to cook and to hike, and has a great appreciation for other cultures, their customs, languages, music, and food. Dr. Forghani also speaks fluent Farsi. She can be seen in our Santa Monica office.

Dr. Dorian Holmes

Dr. Dorian Holmes

Santa Monica Office: (310) 319-1500

Dr. Dorian Holmes is a state licensed and board certified Naturopathic Doctor with a doctoral degree in naturopathic medicine from Bastyr University in Seattle, Washington. Dr. Holmes received her bachelor’s degree in Biology Health Sciences and then her Master’s of Fine Arts studying dance at Florida State University. She was an accomplished performing artist, personal trainer, and teacher before attending medical school.

Among her many fine talents, Dr. Holmes enjoys working with patients and has a special interest in the digestive system, due in part to her own personal experience with digestive problems. Through the years she has worked diligently to optimize her health to meet the high physical performance demands that she places on her body.

Dr. Holmes is originally from Chicago, and now enjoys living and working in Santa Monica. She has an adept knowledge of medical Spanish.

Dr Pentland

Dr. Ken Pentland

Seattle Office: (206) 264-1111

Dr. Ken Pentland is a licensed and board certified physician with a doctoral degree in Naturopathic Medicine from Bastyr University. Dr. Pentland has a personal history of digestive problems which he solved, so he knows what it’s like to be suffering with IBS. He is a firm believer that digestive wellness is at the root of whole health.

In a previous career Dr. Pentland worked as an engineer, having earned an Engineering degree from the University of Arizona. Therefore you can rest assured that he has a keen mind for sorting out complex problems. Dr. Pentland also enjoys playing classical guitar, backpacking, and spending time at home with his wife and two cats. Last but not least, Dr. Pentland has a Masters of Science degree in Acupuncture and Oriental Medicine.

Becky Rajcich RDN

Becky Rajcich, RD

Seattle Office: (206) 264-1111

Becky Rajcich is a state and nationally certified Registered Dietitian Nutritionist and graduated with honors with a degree in Science of Nutrition from Bastyr University. She provides services as a nutritionist (dietitian). 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 patients with food allergies and intolerances.

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 also is 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.

As an endurance runner, Becky discovered her own digestive issues and the importance of identifying ways to work with food that promote quality of life. She brings compassion and commitment to her work with patients and finds joy in helping with them to get through nutrition challenges.

In her spare time Becky enjoys running, reading, cooking, and recipe hunting; and she loves spending quality time with her husband, young son, dog, cat, and chickens.