Dr. John Murphy, president and CEO of Nuvance Health, will retire at the end of December after more than 40 years in health care. Murphy led Nuvance since its 2019 formation, guiding clinical expansion, physician recruitment, and integration with Northwell Health. Michelle Robertson, current COO, will take over as market president for the region starting Jan. 1. Murphy says he plans to continue practicing medicine, mentoring, and spending time with family.