Samuel O. Thier, president of the Institute of Medicine (IOM; now the National Academy of Medicine [NAM]) from 1985 to 1991, passed away on January 3, 2026, at the age of 88.
Thier at the IOM/NAM 45th Anniversary Celebration in 2015
Thier’s tenure marked a pivotal period of renewal and growth for the organization. When he assumed leadership in 1985, the IOM faced significant financial uncertainty and other infrastructural challenges. Through his steady leadership and credibility within academic medicine and philanthropic circles, Thier inspired confidence in the young organization, stabilized its finances, and strengthened the IOM’s standing within the National Academies organization. His stewardship helped position what is today the NAM for greater influence and long-term success.
Under Thier’s guidance, the IOM emerged as a more prominent and trusted voice in national health policy. The organization addressed urgent public health issues of the era, including the HIV/AIDS epidemic, and cemented its role as an independent, evidence-based advisor to government and the public. Thier’s background as a physician and academic leader shaped an organization committed to rigor, relevance, and service to the nation’s health.
Thier’s legacy within the NAM is one of principled, transformative leadership at a critical moment in the organization’s history. The stability, integrity, and sense of purpose he brought to our organization endured long after his presidency ended. Thier was a trusted mentor to countless colleagues and widely respected for his intellectual leadership, compassion, and lifelong commitment to excellence in patient care and health systems. Outside the IOM, he also served as president of Brandeis University, president of Massachusetts General Hospital, and president and CEO of Partners HealthCare (now known as Mass General Brigham). Thier made lasting contributions not only to the NAM but also to the advancement of health and health care in the United States.
The NAM extends heartfelt condolences to Thier’s family, friends, and many others who have been inspired by his vision and service. He will be deeply missed, and his legacy will live on.
