Gastrointestinal Motility Clinic

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The GI Motility Clinic at the University of Washington Medical Center is a consultative clinic that uses advanced technology and comprehensive testing to diagnose GI motility disorders in your digestive system.

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Clinic overview

Motility is the synchronized movement of the muscles and nerves pushing food through your digestive tract. Motility disorders, also known as dysmotility, occur when the muscles and nerves do not function as they should. Motility disorders can affect the GI tract including the esophagus, stomach, small bowel, large bowel, and anal sphincter.

Our team provides personalized consultative recommendations for you and your referring gastroenterology provider to help diagnose and treat these diseases.

We provide consultation for the following GI Motility Conditions:

  • Esophageal motility disorders
  • Stomach motility disorders
  • Small bowel motility disorders
  • Large bowel motility disorders
  • Anal sphincter disorders

Gastrointestinal Motility Services

GI Motility Testing: esophageal manometry, esophageal pH impedance testing, pH monitoring (BRAVO testing), anorectal manometry, EndoFLIP.

Hydrogen Breath Testing: small bowel bacterial overgrowth, intestinal methanogen overgrowth, and carbohydrate intolerance (ie fructose and lactose) 

Comprehensive Clinic Consultation: with a referral from the patient's primary gastroenterologist.

Consultative Appointments and Test Referrals

  • Consultative clinic appointments to the GI Motility Clinic should be directed to fax number (206) 668-1130.
    • The GI Motility Clinic requires that the referral come from the patient’s primary gastroenterology provider.
  • All referrals for testing below should be directed to the Center for Esophageal and Gastric Surgery, fax number (206) 598-6480:
    • Esophageal manometry
    • Esophageal pH impedance testing
    • BRAVO pH testing
    • Anorectal manometry 
  • All referrals for testing below should be directed to fax number (206) 598-4303:
    • Wireless motility capsule (SmartPill)
    • EndoFLIP
    • Hydrogen breath tests 


Margaret D. Eugenio, MD

Margaret D. Eugenio, MD

Clinical Associate Professor of Medicine

Dr. Eugenio's clinical interests include GI motility disorders and GI motility testing. She strives to give comprehensive recommendations incorporating the GI Motility perspective and other chronic diseases that may be associated with GI motility disorders.

Jennifer Ray, MD

Jennifer Ray, MD

Clinical Assistant Professor of Medicine

Dr. Ray's clinical interests include pelvic floor dysfunction and esophageal motility disorders. She believes in patient-centered medicine and a collaborative team approach to providing the best patient care experience possible. Her goal is to make patients active participants in their overall health and well-being.