HeeSun Yu is President of VMLY&Rx Payer, a specialist agency focusing on the development and delivery of payer and reimbursement strategies for the managed markets sector in the U.S. She has over 22 years of ad agency experience, starting her career in medical research at Rockefeller University with a focus on neurobehavioral science, she later transitioned into the agency world to focus on HCP, patient marketing, data analytics, behavioral science, and health economics.