Dr. Munsell attended the University of Illinois at Urbana-Champaign where she received her bachelor of science in biology and psychology with a minor in chemistry. She earned her medical degree from the University of Chicago Pritzker School of Medicine and completed internship and residency in internal medicine with the Osler Medical Service at Johns Hopkins. She continued at Johns Hopkins for gastroenterology fellowship. During fellowship she had an interest in inflammatory bowel diseases and was a visiting fellow at the Cedars-Sinai Inflammatory Bowel Disease Center.
Following her training, Dr. Munsell worked as an attending physician with the Southern California Permanente Medical Group where she practiced general gastroenterology with an interest in inflammatory bowel diseases and motility disorders. She was integral in beginning an inflammatory bowel disease subgroup. She was involved in the interpretation of esophageal motility studies and capsule endoscopy. She is board-certified in Internal Medicine and Gastroenterology.