Dr. Barry Goodman, M.D., is the head doctor hired by Gus as part of an emergency medical crew he had stationed in Mexico.
Better Call Saul
Barry meets with Mike after receiving a call in advance from Gus. He supplies Mike with cocaine. ("Sunk Costs")
Barry and Victor examine Hector, unconscious in his hospital room. Later, Barry reports Hector's condition to Gus and inadvertently suggests medical care from Johns Hopkins. ("Breathe")
Dr. Barry Goodman and his team treat Gus for poisoning and Mike for gunshot wounds after they led an attack on Don Eladio and the Juárez Cartel. He initially ignores Mike and goes straight to helping Gus, because Gus "pays his salary". It is known that he has blood samples and knows the complete medical history of Gus, Mike, Jesse, and most likely others. ("Crawl Space")