Our Doctors​

Our team of doctors and staff is dedicated to patient care that is reliable, affordable, and attainable.

Dr. Beth DiDomenico

Independent Contractor

I am in my 25th year of practice as a primary care naturopathic doctor, practicing both in office and telemedicine in Washington state. I specialize in hormone balancing for men and women, autoimmune diseases, headaches, mental health, gastrointestinal issues, and LGBTQIA+ health.

My focus is on treating the whole person including their history, current stressors, and environmental exposures. I have extensive training in trauma-informed care and I use functional medicine and specialty testing to get to the core of my patient’s symptoms.

I am the founder of Federal Way Naturopathy and a recipient of a number of awards, including a Bastyr Alumni Award and as a residency sight director. My personal life includes playing on our family farm and outdoor adventuring.

Dr. Karen Rasmussen

Independent Contractor

I am committed to offering patients compassionate comprehensive natural medical care. I am passionate about natural medicine and feel called to support my patients in their journey to optimal health and well-being. My passion lies in educating and empowering my patients to make healthy, optimal diet and lifestyle choices that help them thrive. I encourage laughter, optimism and resilience on the path to well-being.

I provide primary care for everyone using my extensive training in nutrient therapy, herbal medicine, bio-identical hormone therapy, diet education, and exercise therapeutics. My clinical interests include women’s health addressing hormonal imbalance such as premenstrual syndrome, menopause, and menstrual irregularities.

I have successfully treated patients of all ages who have anxiety, Type 2 diabetes mellitus, cardiovascular disease, gastrointestinal disorders, thyroid and adrenal dysfunction, and autoimmune conditions. Additionally, I offer testosterone therapy for men and women.

Specializing in children’s health, I offer well-child visits, vaccine consultations, and optimization of immune and nutrient health. I offer treatments for conditions such as allergies, respiratory and ear infections, and inattention.

I graduated with a Bachelor of Arts in Biology from Whitman College in Walla Walla, Washington, where I was inspired to learn a natural, safe, science-based approach to health and wellness. That inspiration led me to seek a doctorate degree in Naturopathic Medicine at Bastyr University in Seattle.

Seeking balance in my life, I enjoy spending time with my husband and two children. I love being outdoors and find rejuvenation in hiking, trail running, and lake swimming. I can also be found logging laps with Blue Wave Aquatics Masters in the early mornings, or cheering poolside for my kids who are active club swimmers.

Dr. Colleen Hart

Independent Contractor

I bring a warm and compassionate presence to my healing work. My goal is to relieve suffering, prevent future disease, and empower patients to be confident in their own self-care.

I practice general medicine with all age groups using nature’s foods and herbs and homeopathic remedies, along with hands-on Craniosacral Therapy and visceral manipulation. This Holistic Health Care combines the best of modern medicine and ancient wisdom, and it requires a balance of body, mind, and spirit.

With 30 years in practice, I can say we are all unique individuals in every way, and we owe it to ourselves to find helpful guides and consultants on our path to a healthy life.

I’ve been a student and a teacher of Tai Chi Ch’uan for more than 40 years. Preparing and eating simple and delicious healthy food is a passion. I also like being out in nature anywhere anytime, enjoying star gazing in early hours, walking and enjoying nature daily, reading, and dabbling in abstract painting.

Areas of Focus in My Practice:

  • Wellness visits for all ages
  • Children’s health (2-year-olds and up)
  • Fatigue, insomnia, menstrual imbalances
  • Prostate health
  • Chronic illnesses: arthritis, osteoporosis, indigestion, eczema, anxiety, depression
  • Detoxification
  • Craniosacral treatment notably effective for:
    • after injury and surgery
    • after head injury
    • newborns, especially with tongue tie and lip tie
    • chronic musculoskeletal problems and pain
    • headaches and migraines
    • vertigo, acute or chronic
    • balance problems

A 1991 graduate of Bastyr University, I have been in private practice for 30 years in Seattle, Burien and Federal Way. As past adjunct faculty at Bastyr, I taught Tai Chi and Craniosacral Therapy. I am a member of the Washington Association of Naturopathic Physicians.

Dr. Allison Greenberg, ND

Independent Contractor

In my naturopathic medicine practice, I enjoy working with family units, not only to improve each individual’s health but also to enhance the health of the home. My special interests are in digestive health, including IBS, SIBO (small intestinal bacterial overgrowth) and other forms of dysbiosis, as well as food sensitivities and other chronic digestive illnesses. I have a passion for nutrition and work with patients to develop customized meal plans.

In my approach to wellness, I evaluate lab work thoroughly to make sure values are optimal and not just “in range.” I also provide specialty lab testing, including food sensitivity testing, comprehensive GI testing, and neurotransmitter and hormone testing. Based on these results, I work with patients to develop tailored treatment plans that are specific to their individual needs.

I earned a Bachelor of Science degree in Biology at Linfield College in Oregon, and a Doctorate in Naturopathic Medicine at National University of Natural Medicine in Portland, Oregon. I completed my integrative residency at Federal Way Naturopathy, working with medical and naturopathic doctors to develop an understanding of naturopathic primary care and allopathic standard of care and where the two intersect.

Outside my role as a doctor, I am a mother of three young boys and thoroughly enjoy chasing them around along with my husband in the great outdoors of the Pacific Northwest.

Dr. Adrienne Wilen

Independent Contractor

Naturopathic medicine is an intricate health care model that uses a combination of natural and clinical therapies in the treatment of each unique person. As a licensed Naturopathic Physician, I work in primary care with a special interest in gastrointestinal and cardio-metabolic health. I see patients for preventive medicine as well as for a variety of acute and chronic conditions.

Throughout my years of practice, I have frequently seen a similar theme in that the source of our health concerns often lies at the center of our bodies: our gut. While not every acute condition (such as ear infection or common cold) arises from issues in the gut, I often spend extra time working with chronically ill patients on optimizing their gastrointestinal tract to help their body find balance.

As a member of the Gastrointestinal Association of Naturopathic Physicians, I am always keeping up with what is new in gastrointestinal care for my patients. Together, we work to identify the source of dysfunction, create long-lasting habits, and finally regain control of health and wellbeing.

I have Bachelor of Science degrees in Microbiology and Biochemistry from Washington State University and spent a year as a microbiologist at Elysian Brewing. While I loved working with microbes, I found humans much more of a puzzle and entered the world of naturopathy by pursuing a Doctorate of Naturopathic Medicine at Bastyr University.

When not seeing patients in the clinic, I spend my time enjoying nature with my fiancé and two dogs. We love the snow and can often be found a few hours outside of Seattle searching for it. I enjoy cooking and optimizing nutrition for myself as well as for my patients and their health.

Dr. Shizue Haffeman-Udagawa ND


As a naturopathic physician, my central therapeutic goal is for patients to increase awareness of how to listen to their own bodies and help find their own specialized path to health. I focus on optimizing health through detailed diagnostic analysis, individualized patient-centered care and health education.  I work in primary care, however, I have special interest in mental health, cardiovascular disease, and gastrointestinal disorders.  Additionally, I have advanced training in craniosacral therapy and integrated pelvic floor therapy.

My path to medicine has been winding.  I have a Bachelor of Science degree in Biomedical Engineering from Johns Hopkins University and spent a few years in research before realizing a pull towards working more directly with patients.  I then spent time working in mental health seeing the impact of mood and stress on physical health.  My passion for integrating the mind and body led me to pursuing a Doctorate in Naturopathic Medicine from Bastyr University.  I am currently completing my residency at Federal Way Naturopathy.

When I’m not at the clinic, you can usually find me exploring nature, spending time on the water, practicing yoga, or experimenting in the kitchen.