Abstract: A percutaneous endoscopic gastrostomy-jejunostomy (G-J) tube apparatus has a percutaneous endoscopic gastrostomy-jejunostomy (PEG-J) tube unit and a jejunostomy (J-tube). The PEG-J tube unit includes two interconnected tubes extending in a side-by-side orientation with respect to each other and a posterior bumper encompassing both of the interconnected tubes adjacent a first end portion thereof. Each one of the interconnected tubes includes a passage extending therethrough between opposing end faces thereof. A first one of the interconnected tubes is configured for functioning as a gastrostomy tube (G-tube) and a second one of the interconnected tubes is configured for functioning as a jejunostomy tube (J-tube) introducer. The J-tube is slideably inserted into a passage of the J-tube introducer. The J-tube includes a plug portion integral therewith and disposed within the passage of the J-tube introducer for providing a fluid-resistant seal between the J-tube and the J-tube introducer.