About Us

The doctors at Walnut Creek Naturopathic are trained in the art and science of natural health care at accredited medical colleges, and licensed by the state Bureau of Naturopathic Medicine. We recognize that the individual — body, mind, spirit — knows its own healing pathways, and we develop therapeutic programs for the individual that are designed to collaborate with natural healing.

Walnut Creek Naturopathic

120 La Casa Via, Suite 104
Walnut Creek, CA. 94598

(925) 939-0300 | Phone
(925) 939-3181 | Fax

Office Hours

9:30am – 5:30pm
Monday – Friday

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Medical Staff

We are family doctors, trained to see patients of all ages and all conditions, and each of us is also trained and experienced in specialties such as integrative cancer care. We work with you to diagnose the underlying causes of disease, and restore optimal health. We emphasize education, prevention, and holistic treatment.

If your condition requires an outside specialist we will refer you to one, and provide supportive care of the whole person while you are being treated by conventional targeted therapies

Dr. Heather Barrett

Owner & Medical Director
Dr. Barrett is a licensed Naturopathic Doctor who has always had a strong desire to be a healer.  With a background in social work, psychology, and competitive sports, she first learned about naturopathic healing while volunteering at an AIDS orphanage in Africa in 2006. [full bio…]

Dr. Cynthia Castillo

Dr. Castillo is a licensed naturopathic doctor and researcher. She is passionate about empowering patients through knowledge, helping them make educated decisions about their health care, with the goal of optimizing their well-being. [full bio…]

Dr. Corrine Wang

Dr. Wang is a licensed Naturopathic doctor and obtained her doctorate of Naturopathic medicine from Bastyr University, a leading accredited institution internationally recognized as a pioneer in natural medicine. Prior to pursuing her interests in medicine. [full bio…]

Dr. Jamie Berner

Dr. Berner is a licensed Naturopathic Doctor who employs functional medicine to identify root causes in treating conditions such as chronic pain and opiod dependency, thyroid disease, gastrointestinal disease and autoimmune disease. [full bio…]

Dr. Melissa Gastellum

Dr. Gastellum chose Naturopathic medicine because it resonated with how she approaches her own health, with its emphasis on prevention and non-toxic therapies to restore balance to the body. She believes the foundations of health include exercise, sleep, individualized… [full bio…]

Support Staff

Annette J. MacDonald

Annette is our office manager and is the friendly voice you hear when calling Walnut Creek Naturopathic to schedule your appointments. Although Annette has a varied background, that includes ergonomics, human resources, and business management, her first love has always been holistic medicine. Annette has a Bachelor’s Degree in Health Science and Health Care Administration as well as certifications in Holistic Nutrition and Health Ergonomics. Annette lives in the East Bay with her husband and her “furry” children Lulu and Blu, and enjoys long walks, reading and dining out with her husband.

Corinne McGuckin

Corinne is our Clinical Receptionist and is the warm and friendly voice you hear when calling Walnut Creek Naturopathic. She has a Bachelor’s in Biology from UC Davis, and is a certified Medical Assistant licensed under the National Health Career Association. Corinne has always had an affinity for healthcare and helping others. Outside of assisting the patients and staff of Walnut Creek Naturopathic, she enjoys traveling, writing as a hobby, and spending time with her “fur baby” Jet.

Zen Frog

Team Mascot Zen Frog has been our team mascot since 2009. It is our hope that he brings a sense of peace and humor to all who enter our space. Feel free to stop in and meet him anytime