The Functional GI and Motility Disorders Clinic at UNC Hospitals is the premier site, both nationally and internationally, for referral of patients with functional GI and motility disorders (FGID). The clinic’s unique multi-disciplinary, patient-centered approach integrates medical, physiological and psychological factors in the evaluation, understanding and treatment of patients with these disorders. The clinic also serves as a leading tertiary referral site for patients who have difficult-to-diagnose illnesses or challenging disease/disorder management issues. The clinic’s services and educational activities have expanded over the last few years. Clinical providers include Yolanda Scarlett, MD, Spencer Dorn, MD, MPH, Danielle Maier MPAS PA-C, Yehuda Ringel, MD (Currently on Sabbatical) and Robin Dever, RN.
On some afternoons, the clinic is also staffed with a Fellow (gastroenterologist in training), who is supervised by an attending physician. The Center’s clinical personnel are also routinely involved with consulting on patients at UNC Hospitals with severe functional GI or motility disorders and with physicians who call for advice regarding their patients. The clinic often has visiting gastroenterologists and trainees from other states and countries who are interested in learning more about the clinical approach, diagnosis and treatment of FGID patients. They also learn how to improve their interviewing and patient skills (see Visiting Scholars).

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Clinical Team

Dr. Yolanda Scarlett

Yolanda Scarlett, MD

Director, GI Motility Lab

Dr. Scarlett is the medical director for the motility laboratory. Her main clinical interests are anorectal disorders, constipation, fecal incontinence, general endoscopy and nonsurgical treatment of hemorrhoids and anal fissures. Dr. Scarlett received her medical degree from the University of North Carolina at Chapel Hill and completed her internal medicine residency and gastroenterology fellowship at UNC.


Dr. Spencer Dorn

Spencer Dorn, MD, MPH, MHA

Vice Chief of Gastroenterology
Director, GI Medicine Clinic

Spencer Dorn, MD, MPH, MHA joined the Center for Functional GI Disorders in 2005. As Vice Chief of the UNC Division of Gastroenterology & Hepatology he works to improve quality of care, operational efficiency, and patient experiences. As Associate Professor of Medicine he conducts clinical trials for functional GI disorders, performs health services research, and examines the impact of health policy and regulations on gastroenterology. His clinical practice focuses on functional GI and motility disorders.

Dr. Dorn graduated with highest distinction from the University of Michigan and summa cum laude from SUNY at Brooklyn College of Medicine. He earned a Master of Public Health (Epidemiology) and later a Master of Healthcare Administration (Health Care Management & Policy) from the University of North Carolina. Dr. Dorn completed his internal medicine training at Brigham and Women’s Hospital, where he was a clinical fellow at Harvard Medical School. He subsequently trained at UNC as a National Institutes of Health Post-Doctoral Research Fellow in Digestive Diseases Epidemiology and Functional GI Disorders, and later as a clinical fellow in Gastroenterology and Hepatology.


Danielle Maier

Danielle Maier MPAS, PA-C

Danielle Maier is a Physician Assistant that has worked in Functional bowel and motililty at UNC for 9 years. Ms. Maier is seeing patients with Dr. Yehuda Ringel, supervising physician, and Dr. Yolanda Scarlett at the UNC FGIMD Clinic two half clinic days a week. She also has her own clinic two half days a week, seeing both new patients and returns. Her patient population includes those with motility disorders, constipation, nausea and vomiting, gastroparesis, SIBO, pelvic floor dyssynergia, etc. She read and interprets anorectal manometries and hydrogen breath tests (lactose intolerance, small bowel bacterial overgrowth, and Helicobacter pylori breath tests) for UNC Hospitals. She has also been involved in clinical research with Dr. Ringel for 9 years.


Robin Dever

Robin Dever, RN

Nurse Coordinator

Robin Dever is a registered nurse and works with Drs. Ringel, Dorn, Scarlett, and Danielle Maier, MPAS, PA-C in clinic and helps to triage patient questions, scheduling for diagnostic tests, and other important aspects to help the clinic run smoothly and efficiently.


Jennifer Layton

Jennifer Layton

Administrative Assistant for Clinical Services

Mrs. Layton is an administrative assistant for clinical services. She facilitates the referral and scheduling process as well as providing support and information to patients seeking treatment.

The GI motility Laboratory

The GI Motility Program at UNC Hospitals was established by Dr. William Whitehead. The clinical motility program including the GI Motility laboratory and the Pelvic Floor Biofeedback Retraining services are directed by Dr. Yolanda Scarlett.

The GI Motility Laboratory provides comprehensive diagnostic evaluation and advice on management of patients with a variety of GI motility disorders. The following services are provided by the GI Motility Laboratory:

  • Diagnostic anorectal motility tests for fecal incontinence, constipation or rectal pain
  • Ambulatory pH and impedance testing
  • Esophageal motility testing
  • Hydrogen breath tests for small bowel bacterial overgrowth and carbohydrate malabsorption
  • Breath tests for h. pylori infection
  • Motility wireless capsule (SmartPill) testing of gastric, small bowel, colonic and whole gut transit
  • Biofeedback treatment for fecal incontinence, constipation, or rectal pain

Patients with GI motility disorders are seen initially in the Functional GI and Motility Disorders Clinic, the UNC Esophageal Clinic or they may be referred directly to the GI Motility Service by referring physicians for diagnostic motility testing and advice on further management. Diagnostic motility tests may be scheduled directly by outside physicians, but a medical consultation from one of the clinicians affiliated with the GI Motility Service is recommended.

Pelvic Floor Biofeedback Retraining

The UNC GI Motility program provides a unique dedicated clinical service of pelvic floor biofeedback retraining treatment for patients with fecal incontinence, constipation due to pelvic floor dyssynergia, and chronic rectal pain. The service is provided by a full-time biofeedback therapist. Biofeedback retraining treatment may be scheduled through consultation with one of the clinicians of the UNC Functional GI and Motility Disorders Clinic.


Sheila Crawford

Sheila Crawford, RN

Lead Nurse in Motility Clinic

Ms. Crawford is the head nurse for the GI Motiltiy Lab.

Psychological Services

As part of our unique multi-disciplinary, patient-centered clinical approach our clinical program also provides integrated Psychological Services. When the medical evaluation of a patient visiting the Functional GI and Motility Disorders Clinic suggests that psychological evaluation, advice and/or intervention may be beneficial for an individual patient, a psychological consultation is offered and may be brought into the patient’s care.

Psychological services specializes in the treatment of patients with chronic gastrointestinal illnesses and provide the following psychological techniques or therapies in collaboration with the patient’s other healthcare providers:

  • Stress Management: Stress management therapy seeks to help a person understand the role of stress in his/her life and how it relates to the person’s FGID symptoms. It also seeks to provide the patient with a variety of ways for dealing with stressful events in ways that minimize their impact on the person’s FGID symptoms and quality of life.
  • Cognitive Behavioral Therapy (CBT): CBT focuses on the interrelationship between a patient’s thoughts (cognitions), actions (behaviors) and feelings (affect), and the role they play in their FGID symptoms. A common example is to beat the “vicious cycle” that occurs when chronic severe symptoms lead to psychological distress which, in turn, worsens the symptoms. By understanding and focusing on the psychological components of the “brain-gut axis”, changes can be made in how a patient thinks, acts and feels about his/her GI difficulties, and thereby help reduce the frequency and intensity of FGID symptoms.
  • Relaxation Therapy: Relaxation therapies to reduce a person’s current state of physical and psychological activation include progressive muscle relaxation (PMR), autogenic training, breath regulation, and meditation. With these techniques, a person can learn how to “turn down the volume” on their GI symptoms by becoming more calm and relaxed about them.