The number of bariatric procedures performed annually is increasing along with the number of complications. Gastrointestinal leak after bariatric surgery generally portends high morbidity and mortality, and its management depends on clinical and radiographic presentation. A leak is defined as an enteric defect with extravasation of luminal contents. Fistulae are abnormal connections between two epithelialized surfaces, are usually chronic, and may develop from long-standing leaks. Endoscopic therapies may offer an attenuated risk profile compared with surgical intervention and play a growing role in the management of postbariatric complications. Leak resolution may require multiple endoscopic sessions and modalities (e.g., stents, adhesives, plugs, clips, suturing, and VAC-assisted closure); therefore, it is critical to have appropriate follow-up and surveillance after therapeutic endoscopic intervention. This review discusses endoscopic leak and fistula management through endoscopic procedures, addressing indications and candidates for procedure, contraindications, recipient evaluation, and aspects of procedure, including proper timing, equipment, and types. Figures show Roux-en-Y
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