Dr. Mccallum graduated from the Univ De Buenos Aires Fac De Med,Universidad De Buenos Aires Facultad De Medicina in 1987. He works in Tucson, AZ and specializes in Gastroenterology. Dr. Mccallum is affiliated with Tucson Medical Center.
"Dr. McCallum seems to be a good physician. His so-called "clinic" is incompetent and unprofessional. I have now waited 9 DAYS for a response to my inquiry for a return appointment, after the medication he prescribed ran its course with no improvement or change in my condition. "