John W. Colloton, whose leadership spanning over four decades established the University of Iowa’s hospital as one of the world’s premier academic medical centers, died Nov. 14, 2025, in Iowa City at age 94.
An Iowa native from Mason City, Colloton guided the emergence of UI Hospitals & Clinics — now known as UI Health Care Medical Center — as a tertiary and quaternary care facility, teaching and research hospital, and health care resource for patients across the state and region. His appointment as hospital director in 1971 marked the start of a two-decade period of unprecedented growth in medical personnel and services and the construction of modern-era patient care facilities.
Colloton oversaw more than $500 million in construction projects — all without state funding. These capital improvements were vital to recruiting and retaining physicians and other health professionals and establishing programs of world-class medical care for patients. During his tenure as hospital director, it’s estimated that three out of five Iowa families received care at or through UI Hospitals & Clinics. During this same era, seven out of 10 Iowa doctors received all or part of their medical education and training through the university.
Compared to when Colloton began as director in the early 1970s, by the mid-1990s the number of hospital staff had tripled, and patient visits had doubled. It was “all patients coming through one portal, receiving the same class of care,” Colloton said in a 2003 Modern Healthcare profile.
Colloton stepped away from hospital directorship duties in 1993 to become UI vice president for statewide health services, which allowed him to focus on health care reform and related health policy issues. In 2013, the University of Iowa awarded Colloton an honorary Doctor of Humane Letters degree in recognition of his leadership and service. In 2016, he received the UI Hancher-Finkbine Alumni Medallion, one of the university’s highest honors.