A Study of Surgical Interventions in Fistulizing Conditions

This is a non-interventional, prospective study of participants with complex fistulizing conditions (CPF-CD, CD develops CD-RVF and CCF) who are currently undergoing surgical intervention in the real world clinical setting. The study will enroll approximately 750 participants. The data will be collected prospectively at the study sites and will be recorded into electronic data capture forms (EDCs). Participants will be enrolled to the following observational cohorts: * Participants With CPF-CD * Participants With CD-RVF * Participants With CCF This multi-center study will be conducted in the United States, Canada, Europe, and Israel. Participants undergoing surgical interventions to treat fistulas will be enrolled from surgical and gastrointestinal (GI) specialty sites. The overall duration of the study will be 24 months. Data will be collected at baseline with follow-up information collected approximately every 3 to 6 months.