- Colonoscopy
- Flexible Sigmoidoscopy
- Upper Endoscopy / Panendoscopy
- Endoscopic Retrograde Cholangiopancreatography (ERCP)
- Capsule Endoscopy
- Esophageal Dilation
- Breath testing
- Fecal Microbiota Transplantation (FMT or fecal transplantation)
- EUS
- Esophageal Manometry