Welcome to the NUNM SIBO Center

The NUNM SIBO Center includes the NUNM SIBO Lab and a team of SIBO-focused naturopathic physicians and many other providers who treat patients using natural medicine. The NUNM SIBO Center was co-founded in 2013 by Dr. Steven Sandberg-Lewis, Dr. Allison Siebecker, and Dr. Melanie Keller. The center’s mission is to educate and treat patients with SIBO and other gastrointestinal disorders.

The NUNM SIBO lab also plays a pivotal role in the SIBO Center as it offers analysis and results for the SIBO Breath Test for providers throughout the United States. Through collaboration with some of the top SIBO doctors in the country, the SIBO lab has developed a respect and understanding of SIBO and strives to offer information in the most beneficial way possible to both patients and physicians while utilizing the highest standards of quality assurance.

Providers should fax orders to 503-444-6709. Please note, we do NOT reach out to patients for payment. Patients are to pay for their test here. Orders may take up to 7 business days to ship. Each test comes will all instructions and a pre-paid return label. At this time, we do not offer on site testing.

Patients: your test payment will show on your bank statement under the name National University of Natural Medicine, NUNM Health Centers, or a similar acronym. This is because we are a part of the National University of Natural Medicine.

Pay for Your Test

Provider Registration