Study of Enterra Programming with Nocturnal Cycling in Gastroparetics

In order to be eligible to participate in this study, a participant must meet all of the following criteria: 1. Completed informed consent process with signed and dated informed consent form; 2. Stated willingness to comply with all study procedures and availability for the duration of the study; 3. Male or female, aged ≥18 or ≤70 at time of informed consent; 4. Currently implanted with the Enterra® Therapy System (Enterra® II 37800 neurostimulator); 5. High GES output defined as remaining pulse generator expected life of \> 9 months from enrollment and less than 4 years from the time of implant; 6. Stable gastroparesis symptoms, in the opinion of the investigator; 7. On stable medical therapy for gastroparesis symptoms; 8. On stable supplemental nutritional support during the month prior to enrollment; 9. English language comprehension to complete study-required assessments; 10. Reliable access to internet-connected smart device(s) to complete study-required assessments. A participant who meets any of the following criteria will be excluded from participation in this study: 1. Post-surgical gastroparesis (e.g., fundoplication, Bilroth I or II) or other active stomach or gastrointestinal diseases disorders which could explain symptoms in the opinion of the investigator; 2. Subjects, in the opinion of the investigator, with profound nausea and/or vomiting at night; 3. Subjects, in the opinion of the investigator, with profound gastroparesis symptoms upon waking in the morning; 4. Subjects without a regular and defined sleep schedule; 5. Pregnancy, or subject that intends to become pregnant during participation in the study; 6. Chemical dependency; 7. Enterra lead impedance measurements ≥ 700 Ohms at screening visit; 8. Life expectancy \< 1 year from conditions other than GI diseases; 9. Subjects with an underlying disease leading to follow-up by MRI outside of current MR conditional indications; 10. Participation in other clinical studies; 11. Subjects involved in current or past medical-related litigation; 12. Subjects with cognitive impairment or other characteristic that would limit subject's ability to complete study requirements.