Dr. Marrion is originally from East Lyme, Connecticut. She obtained a BS from Penn State University, following which she spent several years in biomedical research. She graduated from the University of Missouri with a DVM in 1991 and spent one year as a small animal intern at Angell Memorial Animal Hospital in Boston, MA. Dr. Marrion then returned to the University of Missouri as an ophthalmology resident. She finished her residency and became board certified in 1997. Concurrently with her residency she received a Ph.D in infectious diseases of the eye from the University of Missouri. Dr. Marrion joined InTown Veterinary Group in September 1998.