Dr. Kristen Barrett is a General Physician and Gastroenterologist in B…read moreillings 59101, Billings MT and has an experience of 11 years in these fields. Dr. Kristen Barrett practices at St Vincent Healthcare in Billings 59101, Billings MT and Carondelet St. Joseph's Hospital in Tucson 85711, Tucson AZ. She completed Bachelor of Science in Nursing Science from Northeastern University in 2000,Masters Degree of Science of Nursing from Grand Canyon University in 2009 and MD in School of Medicine from Royal College Of Surgeon In Ireland in 2011.read less