Embodiments of the present invention provide a magnetic anastomosis device (MAD), a delivery catheter for the MAD, and a method for treating at least one of diabetes, obesity, digestive disease, and non-alcoholic fatty liver disease. In embodiments of the present invention, a pair of the MADs are delivered in body lumen by endoscopic and/or laparoscopic techniques. An anastomosis between two adjacent body lumens is formed by compression of the pair of MADs followed by necrosis and regeneration of the lumen tissue. The bodily fluids are then redirected through the formed anastomosis to relieve disease symptoms.