GNS Healthcare, a leading provider of big data analytics in health care, today announced the appointment of Jan Berger, MD, MJ, to its board of directors. Berger, who served CVS Caremark as chief clinical officer for nearly 10 years, is an internationally recognized expert in medication adherence and value-based health care. She is currently president and CEO of Health Intelligence Partners, a consultancy providing business strategies and solutions to clients across the care continuum.