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Christina Bergstrom M.D. ABIHM

Christina Bergstrom is a physician, teacher and mother with extensive training in Functional Medicine, Integrative Medicine, Nutrition and Acupuncture. She has been interested in nutrition and the body’s power to heal itself since childhood and has been studying how to assist the body in creating optimal health ever since.

Her functional medicine journey began years ago when she studied biochemistry during her undergraduate years at Harvard University. She began to understand and appreciate the complexity of the body’s chemistry, but felt the need to help people more directly than she could as a researcher. She worked with Dr. Brian Berman, a physician and alternative medicine researcher for the NIH, and learned about the role that acupuncture and alternative medicine can take within a conventional medicine setting.

Inspired by the brilliant minds around her with the same interest in creating true health, she decided to study medicine to use the best of science along with her desire to connect with and help people.

During her medical school training at Tulane University Medical School in New Orleans she maintained her dedication to educating herself about natural health. She studied several forms of meditation, developed presentations on nutrition and in her fourth year of medical school she completed the Helms Medical Acupuncture Course in addition to her conventional medicine training. 

When she graduated from medical school Dr. Bergstrom chose to specialize in family medicine, because it seemed most consistent with her desire to teach people how to prevent and proactively treat disease. She completed her family medicine residency at Providence Milwaukie Hospital in Oregon.

Dr. Bergstrom stayed in the Portland area and practiced family medicine with PeaceHealth Medical Group in Vancouver, Washington. She used natural medicine, acupuncture and lifestyle changes to help her patients. She had two lively children, and her desire to educate herself and others about optimizing health became even stronger as she learned about the profound effects of nutrition and environment on pediatric health.

Even though she already had extensive training in integrative medicine, one of her real “ah-ha!”moments occurred during her first functional medicine conference. At this conference she heard thought leaders in the functional medicine movement talk about fully understanding prevention, finding the underlying cause of illness rather than simply treating symptoms, and using the most up to date knowledge about biochemistry, labs and medications. Dr. Bergstrom believes that this is what all MDs went to medical school for, but were never taught and has since felt that functional medicine is her hobby and her passion as well as her career. 

She continued her integrative medicine education and studied the Institute for Functional Medicine curriculum. Since then, she has become a passionate educator who enjoys showing  people that they have the ability to heal themselves once they have the right tools and the right information. She has developed programs to help everyone reclaim their health and enjoys witnessing the amazing benefits that people receive when they take charge of their health armed with the right information.


Sarah Silverman, ND

As a Naturopathic Doctor, Dr. Sarah Silverman is passionate about sharing the benefits of healthy living and teaching patients how they can optimize their health on an individual level. She aspires to teach her patients how to enhance their wellness in all aspects of their lives.

After discovering naturopathic medicine on her own journey towards optimal health, Dr. Silverman quickly learned of the power that natural medicine can have in developing a healthy lifestyle. She obtained her Doctor of Naturopathic Medicine from The Canadian College of Naturopathic Medicine, and practiced briefly in Toronto, Canada before moving to Portland, Oregon. Dr. Silverman is a licensed Naturopathic Doctor in Ontario, Canada and Portland, Oregon. Prior to her medical studies, she obtained a Bachelor of Science in Biology from the University of Windsor.

Having recently completed her residency through the Council on Naturopathic Medical Education, Dr. Silverman is excited to join the team at Northwest Functional Medicine.  Her residency focused predominantly on primary care, and she is excited to partner with Dr. Bergstrom and her team to apply these skills with a focus on naturopathy - treating the true cause of illness.

Dr. Silverman’s educational and clinical training has equipped her with the tools to treat a wide variety of acute and chronic conditions, and has fostered her specialized interests in pediatric care, gut health and gastrointestinal disorders.  Using the knowledge gained during her naturopathic medical training and the clinical skills acquired from treating a wide variety of patients, she will work in partnership with you to achieve optimal health.

In her spare time Dr. Silverman enjoys hiking, cooking, practicing yoga, and spending time with her husband and her Chesapeake Bay retriever.

Michiko Oishi MSHS PA-C

Michiko (Mo) is a functional medicine provider who has been practicing integrative and lifestyle medicine over the last 2 years, with a focus on food, hormones, exercise and meditation. She enjoys teaching her patients about integrative medicine. She expects to earn a certification in functional medicine through The Institute for Functional Medicine ( in early 2017. She is a guest lecturer for the PA program at Pacific University. 


Mo earned a Physician Assistant degree from The George Washington University ( in 2012. Mo has also served as a volunteer paramedic, a CPA, a technology manager, and consultant. 


Mo has grown up with alternative therapies. Her parents are both immigrants and brought with them many Asian therapies. She is a Reiki master, and has also studied Applied Kinesiology and is in process with her first 100 hour course. Her interests are studying cultural eating (traditional diets) and how they affect genetic expression. In her other clinical experiences, she incorporates as much of traditional diets as is available to provide a more cost effective way to improve diet, weight loss, and manage chronic disease.



Beth truly believes each of us must take an active role in our own health journey. Every day we make choices that impact our current and future health. Beth works hard to offer patients knowledge, support and encouragement to help them make changes in their own lives.  

After shifting her focus from biology into communications during her undergraduate degree at Northwestern University, Beth’s career took a different direction than expected. She worked in communications consulting for more than 10 years, helping various clients develop health and wellness communications. She enjoyed a successful career, but still felt like something was missing. Communications work didn’t offer many opportunities to connect with clients face to face. Realizing she wanted to work directly with patients in a hands-on or teaching role, it was time to make a career change. 

Upon completing her Master of Science in Nutrition from the National College of Natural Medicine in Portland, Beth was ready to marry her love and knowledge of nutrition with her experience in communications. As a nutritionist, Beth has worked with clients from various backgrounds with a primary focus on nutrition for aging health, as well as teaching clients how to shop for, prepare and cook delicious — and nutritious — foods.

Beth was ecstatic to learn of Northwest Functional Medicine. She knows the education and support provided in our program is a critical piece of the puzzle — one that, unfortunately, many practices fail to incorporate.

If you look for Beth outside the clinic, you’ll likely find her making a gourmet farm-to-table meal, climbing a tree, picking up trash in natural habitats or swimming in the sea.