Certified Gastroenterology Nutritionist

Tina Patnode, RDN, LD, CD

Registered Dietitian Nutritionist & Owner of GI Nutrition NW, LLC


Tina Patnode is a Registered Dietitian Nutritionist (RDN) with over 25 years of experience providing Medical Nutrition Therapy (MNT) for individuals with gastrointestinal conditions such as Irritable Bowel Syndrome (IBS), Inflammatory Bowel Disease (IBD), Small Intestinal Bacterial Overgrowth (SIBO), Intestinal Methanogen Overgrowth (IMO), Celiac disease, and Gastroparesis.

Tina also works with those individuals who have not received a definitive diagnosis but suffer from nausea, vomiting, loss of appetite, acid reflux, abdominal bloating, abdominal pain, diarrhea, and constipation.

Tina has always had a dream to start her own private practice. So, that is exactly what she did! In 2018, Tina founded GI Nutrition NW, LLC and opened her office in Southwest Portland. In March of 2020, Tina began providing Telehealth to those who reside in Oregon, Washington, California, Arizona, and Colorado.

Outside of her thriving private practice, Tina is advancing her practice as an Integrative and Functional Nutrition Certified Practitioner applying a food as medicine approach to optimizing digestive health. She successfully completed the GI Dietitian’s Roadmap Course and is a Certified Gastroenterology Nutritionist through the SIBO Academy.

Dietitian Alyssa

Alyssa O'Brien, RDN, LD

Registered & Licensed Dietitian / Nutrition Coach & Counselor


Alyssa has over 12 years experience as a registered and licensed dietitian using medical nutrition therapy to treat a variety of chronic health conditions. This gives her a depth of knowledge to draw upon as a nutrition coach and counselor. Alyssa has gained expertise in GI nutrition while working at wellness clinics in St. Paul, MN and a Gastroenterology clinic in Portland, OR. Alyssa treats patients with, but not limited to, the following conditions:

  • Irritable Bowel Syndrome (IBS)
  • Inflammatory Bowel Disease (IBD), Crohn’s, Colitis
  • Celiac Disease
  • Gastroparesis
  • Small Intestinal Bacterial Overgrowth
  • Food Allergies and Intolerances
  • PCOS
  • Hormone Imbalance
  • Endometriosis
  • Perimenopause/Menopause/Post-Menopause

Alyssa practices using a functional nutrition approach, meaning she works with you to identify the root cause of symptoms or chronic conditions to sustain long-term wellness. She believes in a whole systems approach to nutrition treatment plans and holds space for mind-body connections to healing. Alyssa is taking steps to become a certified practitioner in integrative and functional nutrition.

GI Nutrition NW Professional Memberships & Affiliations

  • Academy of Nutrition and Dietetics
  • Certified Gastroenterology Nutritionist-SIBO Academy
  • Dietitians in Medical Nutrition Therapy Dietetic Practice Group
  • Dietitians in Gluten and Gastrointestinal Disorders Dietetic Practice Group
  • Dietitians in Women’s Health Dietetic Practice Group
  • Nutrition Entrepreneurs Dietetic Practice Group
  • Gluten Intolerance Group
  • Crohn’s and Colitis Foundation of America
  • Integrative and Functional Nutrition Academy

Member of the Academy of Nutrition and Dietetics

registered dietitian nutritionist Certified Gastrointestinal Nutritionist CGN


“Tina was very knowledgeable and pleasant. She understood my situation. She gave me much information and I would recommend her to my family and friends.” ~Sara~

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