In 2015, Lynch became the first woman president of Aetna and in 2018 the executive vice president of CVS Health due to the merger. She is dedicated to improving the consumer experience through simpler and more responsive practices and affordable prices. Lynch told Modern Healthcare that she thinks of herself “as an innovator and leader in creating a holistic health system.” She has launched community-based service programs for Aetna members addressing the opioid crisis.