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Dr. Greg Nigh, ND, LAc

Medical Director, Primary Care Physician, Naturopathic Oncologist, Acupuncturist.

Dr. Greg Nigh co-founded Immersion Health in 2014 with Maria Zilka, NTP. Dr. Nigh is a graduate of the National College of Natural Medicine (now the National University of Natural Medicine, NUNM), where he completed both the Naturopathic Doctor (ND) program and the Master of Science in Oriental Medicine (MSOM) programs. Prior to studying naturopathic medicine, he attended the University of Notre Dame, where he received his Bachelor's in English, and he then completed a Master of Humanities program at Arizona State University.

Prior to his work at Immersion Health, Dr. Nigh co-founded Nature Cures Clinic in 2001. It was during his early years of work there that he developed his interest and passion for researching and implementing alternative cancer therapies. It was also at Nature Cures Clinic that Dr. Nigh began collaboration with Maria Zilka, which spanned his last 5 years of work there.​

Dr. Nigh (he prefers “Greg”) works very hard to be easily accessible to every patient in treatment programs with him. He spends a great deal of time with patients, always attempting to have a complete understanding of each individual, their personal circumstances and challenges, and the best strategy for implementing the appropriate treatment program. ​​​​​​

Dr. Nigh has been a prominent voice within the naturopathic profession. He has spoken several times at the annual convention of the American Association of Naturopathic Physicians on topics as diverse as naturopathic treatment of strokes, the use of hypnosis in clinical practice, and the use of energy medicine in the treatment of anxiety and depression.  He has twice spoken at the national conference of the Oncology Association of Naturopathic Physicians on cancer cell metabolism.

Every year Dr. Nigh attends and has twice spoken at the Conference on the Physics, Chemistry and Biology of Water in Bulgaria, where he has educated researchers from around the world about the unique role of sulfur in the maintenance of water structure in the body. 

In addition to his work with cancer patients, he also works extensively with Lyme disease, mold toxicity and related illnesses, chronic fatigue and fibromyalgia, gastrointestinal symptoms including inflammatory bowel disease, and many other challenging conditions. He has received additional training in both environmental medicine, and also in heavy metal testing and IV chelation therapies. He creates comprehensive detoxification and rebalancing programs related to all these conditions, utilizing one of the widest ranges of therapeutic modalities available ​

Dr. Nigh is a prolific reader, researcher and writer. He wrote about the metabolic treatment of cancer for the Townsend Newsletter, and he contributed a chapter to the upcoming two-volume Foundations of Naturopathic Medicine textbook. He has teamed up with MIT's Stephanie Seneff to publish two peer-reviewed papers on the health consequences of exposure to glyphosate, the active ingredient in the herbicide Roundup (12).

He also enjoys writing book reviews, essays, and even short stories. Topics of deep interest and ongoing exploration range from evolutionary biology, epigenetics, and the politics of science, to cosmology, metaphysics, zen philosophy, psychology, information theory and biosemiotics, current events and, of course, the biology and physiology of health and disease in general, and cancer in particular.

He is an active member of the following professional organizations:

American Association of Naturopathic Physicians

Oregon Association of Naturopathic Physicians

Oncology Association of Naturopathic Physicians

Gastroenterology Association of Naturopathic Physicians

Naturopathic Academy of Environmental Medicine

Cost of Services

New Patient Appointment (1 hour in-office, 45 minutes phone or telemedicine)


Standard Follow Up



Schedule with Dr. Greg Nigh

Please note that when scheduling new patient appointments online with Dr. Nigh a deposit of the total cost of your appointment (Either $300 or $315) will be collected at the time of scheduling. If you are planning on using insurance for your appointment that deposit will be refunded to you on the day of your appointment. If you are not using insurance, that deposit will be used as a prepayment for your appointment. 

To find a list of Insurances Dr. Nigh accepts click here

All appointment requests must be approved by the front desk. If you are scheduling a new patient appointment the front desk will be calling you within 1 business day of your request to collect said deposit. If you do not answer, your request can be held for 48 hours from request time.